U.S. Route 101 in California

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U.S. Route 101
Defined by S&HC § 401, maintained by Caltrans
Length:	808.09 mi[1] (1300.49 km)
Formed:	1926
South end:	I-5 / SR 60 in Los Angeles
Major junctions:	SR 33 in Ventura SR 166 in Santa Maria SR 68 in Salinas I-880 in San Jose I-80 in San Francisco SR 20 near Ukiah SR 299 near Eureka
North end:	US 101 towards Brookings, OR
State highways in California (list - pre-1964) County routes in California (list) < SR 99 SR 103 > History - Unconstructed - Deleted - Freeway - Scenic

In the U.S. state of California, U.S. Route 101 (also known as Highway 101, The 101 in Southern California, and simply 101 in Northern California) is one of the last remaining and longest U.S. Routes still active in the state. US 101 was also one of the original U.S. Routes established in 1926.

This route is part of the California Freeway and Expressway System^[2].

Contents 1 Route description 1.1 Los Angeles to Ventura 1.2 Central Coast 1.3 San Francisco Bay Area 1.4 North Coast 2 History 3 Control cities 3.1 Northbound 3.2 Southbound 4 Major intersections and exit list 5 References

[edit] Route description

[edit] Los Angeles to Ventura

The south terminus of U.S. Route 101 is in Los Angeles, about one mile east of downtown Los Angeles at the East Los Angeles Interchange, also known as the "Commuters' Complex" or sometimes, "The Five Level". This southernmost portion is named the Santa Ana Freeway, inheriting that title as the northerly extension of the roadway now known as Interstate 5.

After merging with westbound traffic from the San Bernardino Freeway (I-10), U.S. Route 101 then proceeds northwest via the Downtown Slot under the northern edge of Los Angeles' Civic Center to State Route 110 at the Four Level Interchange. From here, U.S. 101 becomes the Hollywood Freeway. It then heads to Hollywood and up through the Cahuenga Pass before reaching the San Fernando Valley.

Highway 101 then intersects with State Route 134 and State Route 170 at the interchange known as the Hollywood Split. Here, the alignment of U.S. 101 'shifts' to the alignment of SR 134 (i.e. heading northbound, the road's alignment turns left, or westbound) and thereafter is referred to as the Ventura Freeway until it reaches Ventura. Confusingly, the "Hollywood Freeway" name continues northward from this interchange on SR 170, and the "Ventura Freeway" name continues eastward to SR 134.

From the Hollywood Split, U.S. 101 is an east-west highway until it reaches Gaviota State Park in Santa Barbara County where it shifts back to a north-south alignment. The east-west geographical alignment of the Ventura Freeway and the north-south designation on freeway signs can be confusing to visitors; the same freeway entrance can often be signed as "101 North" and "101 West"; this is most common in the San Fernando Valley.

[edit] Central Coast

North of Ventura, U.S. 101 is an intermittent freeway (i.e. there is occasional cross traffic) but there are no traffic signals until one arrives at San Francisco. The last traffic signals along this stretch of the highway were removed in the early 1990s when the section through downtown Santa Barbara was constructed after years of resistance from the Santa Barbara community.

From Ventura and through Santa Barbara, Highway 101 closely follows the Pacific coastline (generally no more than one to two miles from the shore) until Gaviota State Park about 23 miles (37 km) west of Goleta. At Gaviota State Park, the highway shifts back from an east-west highway to a north-south alignment. About 1 mile north of this point, U.S. 101 passes through the Gaviota Tunnel.

A few miles north of the Gaviota Tunnel, State Route 1 splits from U.S. 101 and heads northwest, running along the Pacific coastline in California, parallel and to the west of U.S. 101.

Farther north, State Route 1 rejoins the 101 for a section between Pismo Beach and San Luis Obispo. Then U.S. 101 takes an inland route through the Salinas Valley, while Highway 1 heads northwest, running along the Pacific coastline in California, parallel and to the west of U.S. 101.

A steep segment (7% grade) between San Luis Obispo and Atascadero is known as the Cuesta Grade. North of Atascadero, the highway joins State Route 46 (SR 46) for about three miles through Paso Robles

From Paso Robles to Salinas, U.S. 101 is an expressway known as the Salinas River Valley Highway, since the Salinas River Valley extends from Santa Margarita to the State Route 156 (SR 156) Junction in Prunedale. The highway passes Camp Roberts, south of Bradley, and the huge San Ardo Oil Field about five miles south of the town of San Ardo; this is near the point where the wide agricultural bottomlands of the Salinas Valley begin.

[edit] San Francisco Bay Area

When U.S. 101 reaches Gilroy, it becomes the South Valley Freeway, and it then heads through the suburb of Morgan Hill before reaching San Jose. From San Jose to San Francisco, Highway 101 is known as the Bayshore Freeway as it passes through Palo Alto and the other major communities along the San Francisco Peninsula. This segment was originally Bayshore Boulevard, later redesignated the 101A bypass and upgraded to freeway by the late 1950s. This section of 101 from San Jose north to San Francisco is very heavily-travelled. The stretch between Redwood City and South San Francisco was the Bay Area's first freeway when it opened in 1947; over the next 20 years the stretches from San Jose to Redwood City and South San Francisco to San Francisco were upgraded to freeway.

Highway 101 is called the James Lick Freeway, named for James Lick, a philanthropist, from the San Francisco county/city line, through the interchange with I-280 at the Alemany Maze, until the junction with the San Francisco Skyway (Interstate 80) and the Central Freeway near the city's Civic Center. Highway 101 continues in a northwestern direction on the Central Freeway, and then leaves the freeway to run north on Van Ness Avenue. At the intersection of Van Ness Avenue and Lombard Street, Highway 101 heads west on Lombard Street, and then on Richardson Avenue, entering The Presidio, where it becomes a divided highway again (known as Doyle Drive). It is then joined by Route 1 before approaching and crossing the Golden Gate Bridge.

From San Francisco north the highway is heavily traveled by commuters through to Windsor, just north of Santa Rosa. North of the Golden Gate Bridge, U.S. 101 enters Marin County and is known as the Redwood Highway. After crossing the bridge, U.S. 101 passes through the Waldo Tunnel, the first of its kind in 300 miles (the other being the Gaviota Tunnel in Santa Barbara County), before passing through San Rafael and Novato. The section between Novato in Marin County and Petaluma in Sonoma County changes from its original six or eight lanes through Marin to four lanes, and is thus called the "Novato Narrows" by locals. The entire area between Novato and Petaluma is also the voter approved Novato–Petaluma Community Separator, which forbids most development. Upon entering Sonoma County it continues as a four lane freeway, which will be upgraded to six lanes by 2010. The interchange with State Route 12 is named the Grape Crush Interchange for California's Wine Country; like the Orange Crush Interchange in Southern California, it handles major traffic loads, which makes for traffic jams from 6:00 AM through to 8:00 PM. It proceeds past a sometimes narrow river valley with the Russian River before leaving Sonoma County and entering Mendocino County.

[edit] North Coast

The freeway portion ends north of Cloverdale, and it narrows to an expressway and eventually a two-lane road south of Hopland, the first time since leaving San Francisco. There are plans for a proposed bypass to the east of Hopland which would make US 101 from its inception in Los Angeles to Ukiah a four-lane road. In the community of Calpella, State Route 20 merges with US 101, where it will remain that way until reaching the city of Willits. South of Willits, US 101 ascends Ridgewood Summit, the highest elevation along the route's 807-mile trek through California. SR 20 splits from US 101 in downtown Willits. US 101 leaves Willits as a two-lane road, but it soon widens to a four-lane expressway until the intersection with the western portion of State Route 162, where it reverts back to a two-lane road. North of Laytonville, US 101 runs along the Eel River, where it will follow until well into Humboldt County. About 12 miles northwest of Laytonville, US 101 becomes an undivided freeway near the community of Cummings. SR 271 is the old portion of US 101 through this area. At Leggett, US 101 meets SR 1 for the last time, and from this point until Piercy, US 101 runs along a substandard section of highway with frequent landslides. North of Piercy, the freeway portion ends and the road narrows down to two lanes at the point where it enters Humboldt County.

In Humboldt County, U.S. 101 travels through Humboldt Redwoods State Park and a portion of the old, bypassed highway is known as the Avenue of the Giants for the huge, centuries-old redwood trees that can be found there. Near Benbow, US 101 becomes a four-lane undivided freeway until reaching the northern portion of the Avenue of the Giants. There is also a section of freeway through Rio Dell. After the junction for State Route 36 (also the western terminus for that route), US 101 becomes a freeway again between Fortuna and Eureka. North of Humboldt Hill, the road enters the City of Eureka (a potential bypass was successfully blocked repeatedly). As the route traverses Eureka, the southern portion is known as "Broadway" and then as it bears east along Humboldt Bay, the Highway is aligned on a one-way couplet (4th and 5th Streets). Five miles later the highway leaves Eureka's core and continues north. The expressway style section between Eureka and Arcata, which is also a safety corridor, is named the "Michael J. Burns Freeway," in honor of the State Senator who was a proponent of California's Highways. The Highway becomes an unobstructed Freeway through the center of Arcata, passing the the junction for State Route 299 (also the western terminus for that route), in the Valley West (northernmost) part of the college town. The highway continues north as it skirts westerly around McKinleyville on a high bluff north of the Mad River. As the highway reaches Clam Beach (a county park), motorists get their first magnificent full view of the Pacific Ocean north of the Golden Gate. North of Trinidad, the highway narrows to one lane in each direction, except for a 14-mile portion through Redwood National and State Parks running inland east of the Prairie Creek Redwoods State Park boundary. The placement of the highway near giant Redwoods led to increased awareness of the destruction of the redwoods after decades of extensive logging, which ultimately led to the establishment of Redwood National Park in 1968. North of Klamath, the highway closely follows the Pacific coast again. Shortly north of Crescent City, U.S. 101 intersects with U.S. Route 199, which heads northeast as the Redwood Highway, terminating in Grants Pass, Oregon. Highway 101 (no longer called the "Redwood Highway" at this point) continues north along the California coast until it reaches the Oregon border.

[edit] History

Instead of terminating in Los Angeles, Highway 101 used to travel all the way south through San Diego to the United States–Mexico border in San Ysidro. However, this part was deleted in the late 1960s in favor of Interstate 5. The only remnant of the old route is a mileage sign at the Santa Barbara/Ventura County line, which lists the distance to San Diego, even though Highway 101 ends in Los Angeles.

The old alignment in San Diego County from Oceanside to Del Mar is now known as San Diego County Route S21. It is signed unofficially in many places as "Historic Route 101".

[edit] Control cities

This article or section may contain original research or unverified claims. Please improve the article by adding references. See the talk page for details. (February 2008)

[edit] Northbound

Los Angeles and Ventura Counties

• Los Angeles Civic Center – between the East Los Angeles Interchange and the Four Level Interchange
• Hollywood – between the Four Level Interchange and Sunset Blvd
• Ventura – between the Four Level Interchange and Ventura
• San Francisco – between interchange with State Route 126 in Ventura and San Francisco city limits

Santa Barbara, San Luis Obispo, and Monterey Counties

• Santa Barbara – Alternatively used with San Francisco between Ventura and Santa Barbara
• San Luis Obispo – Alternatively used with San Francisco between Hollister Avenue (exit 110) and San Luis Obispo
• Salinas – Alternatively used with San Francisco between Pismo Beach and Salinas

San Francisco Bay Area

• San Jose – Alternatively used with San Francisco between Chualar and San Jose
• Bay Bridge and San Francisco Civic Center – between the San Francisco city limits and I-80
• Golden Gate Bridge – between I-80 and the aforementioned structure

Northern California Coast

• Eureka – between the Golden Gate Bridge and Eureka
• San Rafael – between Marin City and Downtown San Rafael; also alternatively used with Eureka at main signposts
• Santa Rosa – Alternatively used with Eureka until reaching Santa Rosa
• Crescent City – between Eureka and Crescent City
• Oregon Coast – between Crescent City and the Oregon/California border

[edit] Southbound

• Eureka – between Crescent City and Eureka
• San Francisco – between Eureka and the Golden Gate Bridge
• San Jose – between Van Ness Avenue and San Jose
• Los Angeles – between San Jose and the Four Level Interchange
• Santa Ana – between the Four Level Interchange and the East Los Angeles Interchange

[edit] Major intersections and exit list

County	Location	Postmile[1]	#[3]	Destinations	Notes
Los Angeles LA 0.00-38.19	Los Angeles	LA S0.00		I-5 south (Santa Ana Freeway) – Santa Ana	Southbound exit and northbound entrance
		LA S0.00	133	Euclid Avenue	Southbound exit and northbound entrance
		LA S0.00		SR 60 east (Pomona Freeway) / Soto Street – Pomona	Southbound exit and northbound entrance
		LA S0.02	1A	Seventh Street	Southbound exit and northbound entrance
		See Santa Ana Freeway
		LA 1.62	3B	SR 110 (Pasadena Freeway) to I-110 south (Harbor Freeway) – Pasadena, San Pedro	Signed as exit 3 northbound
		See Hollywood Freeway
		LA 11.65	13B	SR 134 east (Ventura Freeway) – Pasadena	Southbound exit and northbound entrance (Hollywood Split)
		LA 11.80	13	SR 170 north (Hollywood Freeway) – Sacramento	North end of SR 170 overlap, northbound exit and southbound entrance (Hollywood Split)
See Ventura Freeway
Ventura VEN 0.00-R43.63	Short gap in freeway
		VEN 43.57	83	Bates Road
Santa Barbara SB 0.00-91.00	Carpinteria	SB 0.63	84	SR 150 east – Ojai, Lake Casitas
		SB 1.61	85	Bailard Avenue
		SB 2.64	86A	Casitas Pass Road	Signed as exit 86 northbound
		SB 3.06	86B	Linden Avenue	Southbound exit and northbound entrance
		SB 3.65	87A	Santa Monica Road	Signed as exit 87 northbound
			87B	Carpinteria Avenue	Southbound exit only
		SB 5.28	88	Padaro Lane, Santa Claus Lane
		SB 7.13	90	Padaro Lane – Summerland
		SB 8.26	91	Evans Avenue – Summerland
		SB 9.00	92	Sheffield Drive
		SB 10.02	93	San Ysidro Road
	Santa Barbara	SB 10.54	94A	Olive Mill Road, Coast Village Road	No northbound entrance
			94B	Hermosillo Drive	Northbound exit only
		SB 11.41	94C	Hot Springs Road, Cabrillo Boulevard, Coast Village Road	Signed as exit 94B southbound
			95	Los Patos Way	Southbound exit only; unsigned
			95	Salinas Street	Northbound exit and entrance
		SB 12.75	96A	SR 144 (Milpas Street)
		SB 13.49	96B	Laguna Street, Garden Street
		SB 14.19	97	Bath Street, Castillo Street – Santa Barbara Harbor
		SB 14.76	98A	Carrillo Street – Downtown Santa Barbara	Signed as exit 98 southbound
		SB 15.26	98B	Arrellaga Street	Northbound exit and entrance
		SB 15.73	99A	Mission Street	Signed as exit 99 southbound
			99B	Pueblo Street	Northbound exit only
		SB 16.55	100	SR 225 east (Las Positas Road)
		SB 17.78	101A	La Cumbre Road, Hope Avenue
		SB 18.38	101B	SR 154 west / State Street – Cachuma Lake
			102	El Sueno Road	Northbound exit and entrance
		SB 20.06	103	Turnpike Road
	Goleta	SB 21.15	104A	Patterson Avenue	Signed as exit 104 southbound
		SB 21.41	104B	SR 217 west – Airport, UCSB	Northbound exit and southbound entrance
		SB 22.53	105	Fairview Avenue
		SB 23.72	107	Los Carneros Road
		SB 24.77	108	Glen Annie Road, Storke Road
		SB 26.91	110	Winchester Canyon Road, Hollister Avenue
	North end of freeway
		SB 30.06	113	Dos Pueblos Canyon Road
		SB 32.84	116	El Capitan Ranch Road
		SB 33.85	117	El Capitan State Beach
		SB 36.62	120	Refugio Road – Refugio State Beach
		SB 44.82	128	Mariposa Reina
				Gaviota State Beach	At-grade intersection
		SB 47.19	Gaviota Gorge Tunnel (northbound only)
		SB 48.85	132	SR 1 north – Lompoc , Vandenberg AFB	North end of SR 1 overlap
	Buellton	SB 56.46	139	Santa Rosa Road
		SB 57.13	140A	SR 246 – Lompoc, Solvang
		SB 57.55	140B	Frontage Roads, Avenue of the Flags
		SB 63.00	146	SR 154 east / Zaca Station Road – Los Olivos, Cachuma Lake
		SB 70.91	154	SR 135 north – Los Alamos, Vandenberg AFB
		SB 78.69	161	Solomon Summit	Unsigned
	South end of freeway
		SB 82.18	164	Clark Avenue – Orcutt
		SB 84.34	167	Santa Maria Way (US 101 Bus. north)
		SB 86.59	169	Betteravia Road – Sisquoc
		SB 87.60	170	Stowell Road
	Santa Maria	SB 88.60	171	SR 166 west (Main Street) – Santa Maria, Guadalupe	South end of SR 166 overlap
		SB 89.69	172	Donovan Road
		SB 90.75	173	SR 135 south (Broadway, US 101 Bus. south) – Santa Maria
San Luis Obispo SLO 0.00-R69.32		SLO 0.81	175	SR 166 east – Maricopa, Bakersfield	North end of SR 166 overlap
		SLO 4.85	179	Tefft Street – Nipomo
		SLO 7.84	182	Thompson Road, Los Berros Road
	Short gap in freeway
	Arroyo Grande	SLO 12.52 SLO 12.80	186	Traffic Way (US 101 Bus. north), Fair Oaks Avenue	No northbound entrance
		SLO 13.18	187A	SR 227 north (Grand Avenue, US 101 Bus. south)
		SLO 13.75	187B	Brisco Road, Halcyon Drive
		SLO 14.61	188	Oak Park Road
		SLO 15.58	189	4th Street, Five Cities Drive	Signed as exits 189 (4th Street) and 190A (Five Cities Drive) southbound
	Pismo Beach	SLO 16.40 SLO 16.62	190B	Price Street (US 101 Bus. north), Hinds Avenue	No northbound entrance; signed as exit 190 northbound
		SLO 16.88	191A	SR 1 south / Wadsworth Avenue – Pismo Beach	No southbound entrance
		SLO 17.75	191B	Shell Beach Road, Price Street (SR 1 south / US 101 Bus. south)	South end of SR 1 overlap
		SLO 19.81	193	Spyglass Drive, Shell Beach Road
		SLO 21.10	195	Avilla Beach Drive
		SLO 22.30	196	San Luis Bay Drive – See Canyon, Avila Beach
		SLO 24.30	198	Higuera Street
	San Luis Obispo	SLO 25.91	200A	Los Osos Valley Road	Signed as exit 200 southbound
			200B	Prado Road, Elks Lane	Northbound exit and entrance
		SLO 27.50	201	SR 227 south (Madonna Road)
		SLO 28.07	202A	Marsh Street
		SLO 28.81	202B	Broad Street
		SLO 29.08	203A	Osos Street, Santa Rosa Street
			203B	SR 1 north – Morro Bay, Hearst Castle	North end of SR 1 overlap
		SLO 29.40	203C	California Boulevard
		SLO 29.77	203D	Grand Avenue – Cal Poly	Northbound exit and southbound entrance
		SLO 29.99	204	Monterey Street	No southbound entrance
	Short gap in freeway
		SLO 37.85	211	SR 58 east – Santa Margarita
		SLO 42.27	216A	Santa Barbara Road	Signed as exit 216 southbound
			216B	San Diego Way	Northbound exit and southbound entrance
	Atascadero	SLO 44.01	218A	Santa Rosa Road
		SLO 44.84	218B	Curbaril Avenue
		SLO 45.57	219	SR 41 (Morro Road)
		SLO 45.96	220A	Traffic Way (US 101 Bus. north)
		SLO 46.87	220B	San Anselmo Road
		SLO 48.33	222	Del Rio Road (US 101 Bus. south)
		SLO 49.32	223	San Ramon Road, Santa Cruz Road
		SLO 50.64	224	Vineyard Drive (US 101 Bus. north)
		SLO 51.45	225	Las Tablas Road
		SLO 52.44	226	Main Street (US 101 Bus. south)
	Paso Robles	SLO 53.89	228	SR 46 west – Cambria, Hearst Castle	South end of SR 46 overlap
		SLO 55.67	229	Spring Street (US 101 Bus. north)	Northbound exit and southbound entrance
			230	Pine Street	Southbound exit and entrance
			230	Paso Robles Street	Northbound exit only
		SLO 56.88	231A	16th Street	Southbound exit and northbound entrance
		SLO 57.92	231B	SR 46 east / CR G14 – Fresno, Bakersfield	North end of SR 46 overlap; signed as exit 231 northbound
		SLO 58.76	232	Spring Street (US 101 Bus. south)	No southbound entrance
	Short gap in freeway
		SLO 65.08	239A	San Miguel	Northbound exit and southbound entrance
		SLO 65.56	239B	10th Street	Signed as exit 239 southbound
		SLO 67.23	241A	San Miguel	Southbound exit and northbound entrance
		SLO 67.71	241B	Camp Roberts	Signed as exit 241 northbound
Monterey MON 0.00-101.32		MON 0.84	244	Camp Roberts
		MON 2.15	245	East Garrison
		MON 7.94	251	Bradley
		MON 9.67	252	CR G18 (Jolon Road) – Fort Hunter Liggett
		MON 15.46	258	Alvarado Road
		MON 17.86	260	Los Lobos Road
		MON 21.99	263	Paris Valley Road – San Ardo
		MON 29.90	271	Paris Valley Road – Lockwood
		MON 32.02	273	SR 198 east – San Lucas, Coalinga
		MON 37.31	278	Wild Horse Road
		MON 39.77	281	First Street (US 101 Bus. north / CR G13 / CR G15) – King City
	King City	MON 40.72	282A	Canal Street
		MON 41.19	282B	Broadway (US 101 Bus. south) – King City
		MON 41.95	283	CR G14 (Jolon Road) – Fort Hunter Liggett
	North end of freeway
				Central Avenue	At-grade intersection
	South end of freeway
		MON 52.66	293	Espinosa Road (US 101 Bus. north / CR G16) – Greenfield
	Greenfield	MON 53.36	294A	Oak Avenue
		MON 53.86	294B	Walnut Avenue
		MON 54.79	295	Thorne Road (US 101 Bus. south) – Greenfield
	Short gap in freeway
		MON 60.40	301	Arroyo Seco Road
		MON 61.59	302	SR 146 (US 101 Bus. north) – Soledad
		MON 62.70	303	Front Street (US 101 Bus. south)
		MON 64.63	305	Camphora Gloria Road
		MON 66.40	307	Soledad Correctional Facility
		MON 69.37	310	Gloria Road (US 101 Bus. north) – Gonzales
		MON 70.86	311	5th Street
		MON 72.61	313	Old Stage Road (US 101 Bus. south) – Gonzales
		MON 76.97	317	Chualar
	North end of freeway
		MON 82.47		Abbott Street (US 101 Bus. north) – Spreckels	Northbound exit and southbound entrance
	South end of freeway
	Salinas	MON 85.62	326A	Airport Boulevard
			326B	Fairview Avenue	Northbound exit only
		MON 86.12	326C	Monterey Peninsula	Signed as exit 326B southbound
		MON 86.82	327	John Street (SR 68)
		MON 87.30	328	To SR 183 (Market Street)
		MON 88.24	329	North Main Street (US 101 Bus. north)	Northbound exit and southbound entrance
		MON 88.24	329	Main Street (SR 183 / US 101 Bus. south) – Salinas	Southbound exit and northbound entrance
		MON 89.27	330	Laurel Drive
		MON 90.97	331	Boronda Road (US 101 Bus. south)
	North end of freeway
				Russell Road	Northbound exit and entrance
				Espinosa Road	At-grade intersection; no northbound entrance
		MON 95.35	336	SR 156 west / Vierra Canyon Road – Monterey Peninsula	South end of SR 156 overlap
			337	San Miguel Canyon Road (CR G12)
				Dumbarton Road to San Juan Road – Aromas, Watsonville	At-grade intersection; no northbound entrance
				San Juan Road – Aromas, Watsonville	At-grade intersection; no northbound exit
San Benito SBT 0.00-7.52		SBT 3.01	345	SR 156 east – Hollister	North end of SR 156 overlap
		SBT 4.90	347	SR 129 west – Watsonville
		SBT 6.48	349	Betabel Road, Y Road
Santa Clara SCL R0.17-T5.19		SCL 3.20	353A	SR 25 south – Hollister, Pinnacles National Monument
	South end of freeway
		SCL 4.94	355	Monterey Street (US 101 Bus. north) – Gilroy
	Gilroy	SCL 6.08	356	SR 152 east (Pacheco Pass Road) / 10th Street	South end of SR 152 overlap
		SCL 7.53	357	SR 152 west / CR G9 (Leavesley Road) – Gilroy	North end of SR 152 overlap
		SCL 10.27	360	Masten Avenue
		SCL 12.46	362	San Martin Avenue
		SCL 15.07	365	Tennant Avenue
	Morgan Hill	SCL 16.00	366	East Dunne Avenue – Morgan Hill
		SCL 17.82	367	Cochrane Road (US 101 Bus. south)
	San Jose	SCL 21.25	371	Coyote Creek Golf Drive
		SCL 23.10	373	Bailey Avenue
		SCL 26.78	377A	SR 85 north – Mountain View, Cupertino	No northbound entrance; signed as exit 377B southbound
		SCL 27.00	377B	Silicon Valley Boulevard, Bernal Road	Signed as exit 377A southbound
		SCL 28.11	378	SR 82 north (Blossom Hill Road) / Silver Creek Valley Road
See Bayshore Freeway
San Francisco		SF 4.36 SF 4.54	433B	I-80 east – Bay Bridge, Oakland	Signed as exit 433 southbound
			433C	Ninth Street – Civic Center	Northbound exit and southbound entrance
			434A	Duboce Avenue	Northbound exit and southbound entrance
			434B	Octavia Boulevard, Fell Street	Northbound exit and southbound entrance
		Gap in freeway; US 101 uses Van Ness Avenue and Lombard Street
				Presidio, Crissy Field	Northbound exit only
			437	Marina (Marina Boulevard)	Southbound exit and northbound entrance
		SF 9.60	438	SR 1 south (19th Avenue) – Golden Gate Park	South end of SR 1 overlap
		SF 9.71	439	25th Avenue – View Area, Presidio, Golden Gate NRA, Fort Point
		SF 11.18 MRN 0.00	Golden Gate Bridge over the Golden Gate
Marin	Sausalito
				Vista Point	Northbound exit and entrance
		MRN 0.32	442	Alexander Avenue – Sausalito
		MRN 0.89	Waldo Tunnel
		MRN 1.52	443	Spencer Avenue, Monte Mar Drive
			444	Rodeo Avenue	No access across US 101
		MRN 3.33	445A	Sausalito, Marin City
		MRN 4.46	445B	SR 1 north – Mill Valley, Stinson Beach	North end of SR 1 overlap
	Corte Madera		446	Seminary Drive
		MRN 5.70	447	SR 131 east (Tiburon Boulevard) / East Blithedale Avenue
		MRN 7.37	449A	Paradise Drive, Tamalpais Drive	Signed as exit 449 northbound
			449B	Madera Boulevard	Southbound exit and entrance
		MRN 8.02	450A	Lucky Drive, Doherty Drive
	Larkspur	MRN 8.47	450B	Sir Francis Drake Boulevard – San Anselmo, Richmond Bridge, Kentfield
	San Rafael	MRN 9.63	451A	Andersen Drive	Southbound exit and entrance
		MRN 10.00	451	To I-580 east / Francisco Boulevard – Richmond Bridge	Northbound exit only
			451B	I-580 east – Richmond Bridge, Oakland	Southbound exit and northbound entrance
		MRN 10.72	452	Central San Rafael
		MRN 12.19	454A	Lincoln Avenue	No northbound exit
		MRN 12.69	454B	North San Pedro Road	Signed as exit 454 northbound
		MRN 13.71	455	Freitas Parkway – Terra Linda
		MRN 14.71	456	Lucas Valley Road, Smith Ranch Road
		MRN 15.57	457	St. Vincent Drive – Marinwood
		MRN 16.64	458	Nave Drive, Alameda del Prado – Hamilton Field
		MRN 18.09	459	Ignacio Boulevard, Bel Marin Keys Boulevard, Entrada Drive – Hamilton Field
	Novato	MRN 18.94 MRN 19.10	460	SR 37 east / South Novato Boulevard – Napa, Vallejo	Signed as exits 460A (SR 37) and 460B (South Novato Boulevard) northbound
		MRN 20.19	462A	Rowland Boulevard (US 101 Bus. north)
		MRN 21.11	462B	De Long Avenue – Downtown Novato
		MRN 22.00	463	Atherton Avenue, San Marin Drive (US 101 Bus. south)
	North end of freeway
				San Antonio Road	At-grade intersection; no northbound entrance
Sonoma				San Antonio Road	At-grade intersection; no northbound exit
	South end of freeway
		SON 2.94	472A	Petaluma Boulevard South (US 101 Bus. north)
	Petaluma	SON 3.58	472B	SR 116 east – Sonoma, Napa	South end of SR 116 overlap
		SON 4.76	474	East Washington Street – Central Petaluma
		SON 5.76	476	Old Redwood Highway, Petaluma Boulevard North (US 101 Bus. south) – Penngrove
		SON 10.67	479	Railroad Avenue	Northbound exit and southbound entrance
	Cotati	SON 12.00	481A	West Sierra Avenue – Cotati	Northbound exit and southbound entrance
		SON 12.69	481B	SR 116 west (Gravenstein Highway) – Rohnert Park, Sebastopol, Cotati	North end of SR 116 overlap; signed as exit 481 southbound
	Rohnert Park	SON 13.88	483	Rohnert Park Expressway
		SON 15.02	484A	Golf Course Drive, Wilfred Avenue	Signed as exit 484 southbound
		SON 15.53	484B	Santa Rosa Avenue (US 101 Bus. north)	Northbound exit and southbound entrance
		SON 16.54	485	Todd Road
		SON 18.49	487	Yolanda Avenue, Hearn Avenue
		SON 19.00	488A	Baker Avenue, Santa Rosa Avenue, Corby Avenue
	Santa Rosa	SON 19.66	488B	SR 12 – Sebastopol, Sonoma
		SON 20.09	489	Downtown Santa Rosa
		SON 20.74	490	College Avenue
		SON 21.74	491A	Steele Lane, Guerneville Road	Signed as exit 491 southbound
		SON 22.52	491B	Bicentennial Way	Northbound exit and southbound entrance
		SON 22.81	492	Hopper Avenue, Mendocino Avenue (US 101 Bus. south), Old Redwood Highway
		SON 24.86	494	River Road – Guerneville, Calistoga
		SON 25.90	495A	Fulton Road – Fulton
		SON 26.33	495B	Airport Boulevard
		SON 27.62	496	Shiloh Road
		SON 29.35	498	Windsor
		SON 30.67	499	Arata Lane	Northbound exit and southbound entrance
		SON 33.48	502	Healdsburg Avenue, Old Redwood Highway
	Healdsburg	SON 34.55	503	Central Healdsburg	Northbound exit and southbound entrance
		SON 34.88	504	Westside Road – Guerneville	Southbound exit and northbound entrance
		SON 36.27	505	Dry Creek Road – Healdsburg
		SON 38.56	507	Lytton Springs Road, Alexander Valley Road
		SON 40.03	509	Independence Lane
		SON 41.43	510	To SR 128 east / Geyserville Avenue – Geyserville
		SON 43.37	512	SR 128 east / Canyon Road – Geyserville, Calistoga	South end of SR 128 overlap
		SON 47.85	517	Asti
		SON 49.05	518	Dutcher Creek Road – Stewarts Point
		SON 50.43	519	South Cloverdale Boulevard (US 101 Bus. north / SR 128 Bus. west)
	Cloverdale	SON 51.62	520	Citrus Fair Drive
		SON 53.40	522	SR 128 west (US 101 Bus. south) – Fort Bragg, Mendocino	North end of SR 128 overlap
Mendocino		MEN 0.48	525	Geysers Road
	North end of freeway
				Old River Road	At-grade intersection
		MEN 10.89		SR 175 east – Lakeport	At-grade intersection
	South end of freeway
		MEN 19.68	544	Burke Hill Drive
		MEN 20.71	545	Cox-Shrader Road
		MEN 21.60	546	SR 253 west – Ukiah, Boonville
		MEN 23.45	548A	Talmage (SR 222)
	Ukiah	MEN 24.06	548B	Gobbi Street
		MEN 24.53	549	Perkins Street, Vichy Springs Road – Central Ukiah
		MEN 26.16	551	North State Street – Ukiah
		MEN 27.41	552	Lake Mendocino Drive
		MEN 30.43	555A	Calpella
		MEN 30.83	555B	SR 20 east – Upper Lake, Williams	South end of SR 20 overlap
		MEN 32.63	557	West Road
	North end of freeway
	Willits	MEN 46.36		SR 20 west – Fort Bragg, Mendocino Coast	North end of SR 20 overlap; at-grade intersection
		MEN 59.31		SR 162 east – Covelo, Round Valley	At-grade intersection
				Branscomb, Dos Rios	At-grade intersection
		MEN 84.69	609	SR 271 north
		MEN 89.57	614	South Leggett (SR 271)
		MEN 91.24		SR 1 south – Leggett, Fort Bragg	At-grade intersection
		MEN 101.89	625	SR 271
		MEN 103.82	627	Piercy (SR 271)
Humboldt		HUM 0.08		SR 271 south – Piercy, Cooks Valley	At-grade intersection
	South end of freeway
		HUM 8.60	636	Benbow
		HUM 11.12	639A	Sprowel Creek Road (US 101 Bus. north) – Garberville	No northbound entrance
		HUM 11.50	639B	Garberville, Redway	No southbound entrance
		HUM 14.31	642	Redwood Drive (US 101 Bus. south) – Redway
		HUM 17.68	645	Avenue of the Giants (SR 254), Hooker Creek Road – Phillipsville
		HUM 22.44	650	Miranda, Phillipsville
		HUM 25.01	653	Salmon Creek Road
		HUM 27.94	656	Myers Flat (SR 254)
		HUM 33.22	661	Weott
		HUM 35.70	663	South Fork, Honeydew (SR 254)
		HUM 39.16	667A	Avenue of the Giants (SR 254)	Southbound exit only
		HUM 39.67	667	Redcrest, Holmes
		HUM 43.32	671	Pepperwood, Redcrest, Holmes
		HUM 45.91	674	Avenue of the Giants (SR 254), Jordan Road – Pepperwood
		HUM 47.95	676	Stafford Road
	Short gap in freeway
		HUM 51.84	679	Rio Dell, Scotia (SR 283 / US 101 Bus. north)
	Rio Dell	HUM 52.60	680	Davis Street
		HUM 53.38	681	Wildwood Avenue (US 101 Bus. south) – Rio Dell
	North end of freeway
		HUM 57.69		SR 36 east – Hydesville, Bridgeville	At-grade intersection
	South end of freeway
	Fortuna	HUM 59.50	687	Kenmar Road (US 101 Bus. north) – Fortuna
		HUM 60.49	688	12th Street
	Fortuna	HUM 61.53	689	Main Street (US 101 Bus. south)
		HUM 62.23	690	Palmer Boulevard
		HUM 63.10	691	Fernbridge, Ferndale (to SR 211)	Northbound exit and southbound entrance
		HUM 64.30	692	Loleta, Fernbridge, Ferndale (SR 211)
		HUM 65.95	694	Loleta Drive
		HUM 68.21	696	Hookton Road – Loleta
	Eureka	HUM 70.61	698	College of the Redwoods
		HUM 72.03	699	Fields Landing
		HUM 72.88	700	King Salmon Avenue
		HUM 73.72	701	Humboldt Hill Road
		HUM 74.77	702	Herrick Avenue, Elk River Road
		North end of freeway
		HUM 79.17		SR 255 north / Myrtle Avenue – Samoa	At-grade intersection
				Jacobs Avenue	At-grade intersection
				Indianola Cutoff	At-grade intersection
	Arcata			Bayside Cutoff	At-grade intersection
		South end of freeway
			712	South G Street	Southbound exit and entrance
		HUM 85.83	713	SR 255 south (Samoa Boulevard) – Arcata, Samoa, Sunny Brae
		HUM 86.50	714A	14th Street – Humboldt State University	Northbound exit and southbound entrance
		HUM 86.94	714B	Sunset Avenue – Arcata, Humboldt State University	Signed as exit 714 southbound
		HUM 88.27	716A	SR 299 east – Weaverville, Redding
		HUM 88.80	716B	Giuntoli Lane, Janes Road
		HUM 90.13	718	Central Avenue (US 101 Bus. north), North Bank Road (SR 200) – McKinleyville
		HUM 91.47	719	School Road
		HUM 92.99	721	Murray Road
		HUM 93.85	722	Arcata Airport
		HUM 95.62	723	North Central Avenue (US 101 Bus. south) – McKinleyville
		HUM 97.02	725	Crannell Road
		HUM 98.07	726A	Westhaven Drive	Northbound exit and southbound entrance
		HUM 98.36	726B	6th Avenue – Westhaven	Signed as exit 726 southbound
	Trinidad	HUM 100.71	728	Trinidad
		HUM 103.38	731	Seawood Drive
		HUM 106.07	734	Patricks Point Drive
	North end of freeway
				Bald Hill Road - Lady Bird Johnson Grove	At-grade intersection
		HUM 126.10	753	Newton B. Drury Scenic Parkway
Del Norte		DN 0.15	765	Newton B. Drury Scenic Parkway
		DN 3.77	768	Klamath Beach Road
		DN 4.64	769	SR 169 east – Klamath, Terwer Valley
		DN 27.87	791	Parkway Drive, Washington Boulevard – Crescent City
		DN 30.81	794	US 199 north to I-5 – Grants Pass	Northbound exit and southbound entrance
				To US 199 north / Elk Valley Cross Road – Grants Pass
		DN 36.26		SR 197 south (North Bank Road)	At-grade intersection

[edit] References

U.S. Route 101
Previous state: Terminus	California	Next state: Oregon

v • d • e Freeways in Greater Los Angeles Radial Hollywood (US 101/SR 170) • Golden State (I-5) • Antelope Valley (SR 14) • Glendale (SR 2) • Pasadena (SR 110) • San Bernardino (I-10/I-215) • Pomona (SR 60) • Santa Ana (I-5/US 101) • Laguna (SR 133) • Corona del Mar (SR 73) • Long Beach (I-710) • Terminal Island (SR 103/SR 47) • Harbor (I-110/SR 110) • Marina (SR 90) • Santa Monica (I-10) Circumferential Ventura (US 101/SR 134) • Foothill (I-210) • San Gabriel River (I-605) • Orange (SR 57) • Costa Mesa (SR 55) • Artesia (SR 91) • Garden Grove (SR 22) • Century (I-105) • Gardena (SR 91) • San Diego (I-405/I-5) • Moorpark (SR 23) • Ojai (SR 33) • Ronald Reagan (SR 118) • Santa Paula (SR 126) Inland Empire Chino Valley (SR 71) • Foothill (SR 210) • Moreno Valley (SR 60) • Riverside (SR 91/I-215) • I-15 • I-40 • I-215 • SR 58 • SR 259 • SR 330 Toll Eastern (SR 133/SR 241/SR 261) • Foothill (SR 241) • San Joaquin Hills (SR 73) • 91 Express

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