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.
Mountain Running - Rocky Mountain trail guides with maps and descriptions. World mountain running trophy information on venues, maps, results. Guide to trail accommodations available.
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.
Peak Trail Runner - A guide to trail running in the UK Peak District national park.
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.
Redwood Trails - Information on a series of trail runs in the Bay Area of California. Race distances range from 5k to the marathon.
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.
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.
USTrailrunner - Includes gear reviews, race calendar, online store, and discussion board.
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.
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