Diablo Summit Stomp

Walnut Creek, United States • 17 Oct 2026

Diablo Summit Stomp

The Diablo Summit Stomp is a trail running event on October 17, 2026 in Walnut Creek at Mount Diablo. Multiple distances are offered on trails that lead toward the summit and surrounding ridge lines.

Distances available

  • 30K
  • Half Marathon
  • 10K
  • 5K

All courses are run on trails. The routes include some hills and, depending on weather, may include mud and creek crossings. Walkers and hikers are allowed to participate in all distances.

The event includes standard race services such as bib pick up and official results. Volunteer photographers provide race photos, and volunteer opportunities are listed for those who wish to help. Race information and an FAQ are provided for participants. Visit the organization's website for the most recent information.

Race information

30 km
30k
Half Marathon
Half Marathon
10 km
10k
5 km
Visit the organization's website for the most recent information.
Trail runs nearby

Experience the scenery of Tilden Regional Park at the Grizzly Peak Trail Run. Choose from various distances including a 50K and marathon starting from the shores of Lake Anza in Berkeley.

An annual fundraiser at Shell Ridge Open Space in Walnut Creek supporting Sustainable Contra Costa and its youth program SLIA. Options include a 5K trail run, two 1.4 mile walking activities, and educational talks by local experts.

Trail runs at Skyline Wilderness Park in Napa offer distances from 10K to 50K with steep Rim Rock climbs and valley views. Aid is touchless and parking is included with registration.

An inaugural trail ultramarathon in Napa offering a 50 mile solo and a two-person 50 mile relay over two long loops through Skyline Wilderness Park and Suscol Headwaters, run as a cupless event with four aid stations and limited crew access..

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