America’s Premier Trail Races

The North Face Endurance Challenge

December; Mill Valley, Calif.

Soft, rolling trails, staircase-steep descents, relentless climbs, Pacific and San Francisco Bay views, salt-breeze-swept grasslands and redwood forests with “Jurassic Park”-sized ferns are just some of the eye-candy treats that keep runners going during this end-of-season, running hurrah. (There are four other locations planned for Endurance Challenge events in 2014.) Pick your pleasure — 5K, 10K, half marathon, marathon, marathon relay, 50K or 50-mile — and grab some friends for unforgettable trails, uplifting camaraderie and a yummy post-race cookout.

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