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Diablo Trails Challenge

Walnut Creek, United States • 5 Apr 2025

The Diablo Trails Challenge is a running event taking place on April 5, 2025, at Mount Diablo, featuring multiple race distances: 50K, half marathon, 10K, and 5K. Organized by Brazen Racing, this event caters to runners of all experience levels, from beginners to seasoned ultra-runners. A portion of the entry fees supports Save Mount Diablo, an organization dedicated to preserving open spaces around the mountain. Participants can enjoy the scenic trails while contributing to a worthy cause, making it a celebration of both fitness and environmental conservation. Visit the organization's website for the most recent information.

United States California Walnut Creek

Race information

Website Registration
50 km
50k
21 km
1/2 Marathon
10 km
10k
5 km
Visit the organization's website for the most recent information.
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