Trail Running

Albany Running Exchange - Trail running club based in Albany, New York. Includes summer trail run series, results, calendar, photos, and member news.
http://www.albanyrunningexchange.org

Trail Runner Magazine Online - Running, health, travel, and training, race results and race event calendars.
http://www.trailrunnermag.com/

USTrailrunner - Includes gear reviews, race calendar, online store, and discussion board.
http://trail.ustrailrunner.com/

Irish Mountain Running Association - Irish mountain running. Trails, races and links on the Island.
http://www.imra.ie/

Shenipsit Striders - Trail running club in Somers, Connecticut, sponsoring the Soapstone Mountain races as well as weekly training runs. Includes race information and results, photos, and links.
http://www.shenipsitstriders.org/

Western Mass Athletic Club - Trail running club in western Massachusetts. In addition to club news, includes information for several trail and snowshoe races as well as the Grand Tree Trail Race Series.
http://www.runwmac.com/

Redwood Trails - Information on a series of trail runs in the Bay Area of California. Race distances range from 5k to the marathon.
http://www.redwoodtrails.com

eHow to Choose Trails for Trail Running - Tips and information about trail running. Requires free membership.
http://www.ehow.com/how_14503_choose-trails-trail.html

Team Gloucester - Trail running club in Gloucester, Massachusetts. Cape Ann trail information and maps as well as an extensive trail race calendar for New York and New England.
http://www.teamgloucester.com

Gil's Athletic Club - Trail running club based in Topsfield, Massachusetts, sponsoring several trail races (primarily ultras). In addition to race information, includes weekly runs, guide to area trails, and photos.
http://www.gaconline.net/

Run Hayward Hills Trails - Trails of Hayward, California. Great for running and riding ATB.
http://members.tripod.com/sr_science/run_hayward_hills/

Perry Scanlon's Home Page - Contains photos and links to trail and workout information near Palm Springs, California, as well as specific information for the Skyline Trail.
http://www.geocities.com/cactus2clouds/

Peak Trail Runner - A guide to trail running in the UK Peak District national park.
http://www.geocities.com/steviestoat/

Northern Arizona Trail Runner's Association - Promotes trail running in Northern Arizona, in the United States. Includes a listing of upcoming races, related links, history of the organization, pictures, membership details, race summaries, and message board.
http://www.natra.org/

All American Trail Running Association (AATRA) - Membership application and extensive collection of links and information on events, trails, equipment, and race results.
http://www.trailrunner.com/

American Discovery Trail - Learn about the first running trail that crosses the entire nation.
http://www.discoverytrail.org/