Trail running club based in Albany, New York. Includes summer trail run series, results, calendar, photos, and member news.

Learn about the first running trail that crosses the entire nation.

Membership application and extensive collection of links and information on events, trails, equipment, and race results.

Irish mountain running. Trails, races and links on the Island.

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.

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.

Running, health, travel, and training, race results and race event calendars.

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.