i-run.com - free web-based running log that will track your mileage, miles on up to ten pairs of shoes, and do comparison graphing with other runners using the log.
Internet Athlete - World wide running, swimming, cycling and triathlon events calendar, results, features, training sites and team/club directory.
Run4Fun With Skyler - created by a high school varsity runner for runners of all ages to share their ideas about treating injuries, etc.
RunChat! - chat room dedicated to the discussion of running and track. For beginners to ultramarathoners, this is where to meet.
Runner's Oasis - includes information about choosing shoes, warming up, and preparing for races. Also has a chat room and links. Designed for high school runners.
Runner's Place - calendar of races, training and nutrition advice, and links.
Runner's Resource - contains info for the high school runner. Includes advice about training, racing, and nutrition.
Runningman, The - official site of Robert Garside, documenting his attempt to become the first person to run around the world.
RunTrack Running Information Center - keep track of your PRs (personal records) and find out what others had to say about that race you're contemplating.
What Was the Best Run of Your Life? - uses a simple mathematical model to compare races run over different distances and produces a ranking of the best.