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Diablo Summit Stomp

Walnut Creek, United States • 18 Oct 2025

The Diablo Summit Stomp is a trail running event held in Walnut Creek, California, featuring distances of 30K, half marathon, 10K, and 5K. The courses traverse dirt trails starting from Castle Rock Park and extend into Mount Diablo State Park, with the 30K route reaching the summit of Mount Diablo. The event welcomes both first-time trail runners and experienced athletes, with walkers and hikers allowed in all distances.

The terrain includes hills, and depending on weather, may feature mud and creek crossings. Courses are well-marked, and aid stations provide water, sports drinks, and snacks. The race fosters a friendly atmosphere encouraging all levels of runners. Visit the organization's website for the most recent information.

United States California Walnut Creek

Race information

Website Registration
30 km
30k
21 km
Half Marathon
10 km
10k
5 km
Visit the organization's website for the most recent information.
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