Trailrunner - American Trail Running Association

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Are you a trail runner? The American Trail Running Association (ATRA) was founded in 1996 as a Colorado non-profit corporation to serve a growing trail running community. Our mission is to represent and promote safe, fun and sustainable mountain, ultra and trail running.

ATRA has the oldest trail race only event calendar on the web. We offer memberships for individuals, clubs, races and brands. Members benefits include Trail Times, ATRA’s quarterly newsletter. Trail Times includes exclusive information about upcoming trail running events, thoughtful articles, and news about our sport and community.

ATRA Members

The following organizations are proud supporters of the American Trail Running Association.

Double-track Members

Event / Race Members

Switchback Members

Single-track Members

Club Members