active.com - extensive race listings and online signups.

Competitive Runner - running gear and book reviews, articles, and FAQ.

Cool Running - news, discussion, and resources.

Hal Higdon - training tips and articles.

Hillrunner.com - the site for everyone who loves running.

Jim2's Running Page - a collection of running wisdom.

Marathon Guide - comprehensive list of marathons around the world, plus news and discussion.

onrunning.com - news, results, schedules, and more.

ontherun.com - running news, articles, race reviews, and more.

rec.running - usenet news group.

Run-Down.com - an assortment of running goodies. "The duct tape of running sites."

Run The Planet - descriptions of where to run in the cities of the world.

Runner's Web - running news, plus an impressive collection of well-organized links.

Runner's World Online - running info ranging from nutrition, injury prevention, and shoes, to race calendars and results.

Running Network - race info, training tips, news.

Running Past - running history and memorabilia.

Running Times - magazine and online running resource.

RunWalkJog.com - event calendars, running and health information.

The Sport Factory - coaching and training resources for running, adventure racing, triathlon, and cycling.

Time-To-Run - comprehensive online running information magazine.

Trailrunner.com - home of the All American Trail Running Association, trail running news and events.

USATF - the governing body for track and field, long-distance running and race walking in the United States.

USCAA - United States Corporate Athletics Association, sponsors corporate athletic events.

Yahoo! Track and Field News - news from the US and international track and field communities.