Diablo Summit Stomp

OCT

17

2026

A trail running event at Mount Diablo in Walnut Creek on October 17, 2026 offering 30K, Half Marathon, 10K and 5K courses on hilly trails where mud and creek crossings are possible.

Sat 17 Oct 2026

Walnut Creek, California

Website Registration

30 kilometers Half Marathon 10 kilometers 5 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

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.

30 km

30k

Half Marathon

10 km

10k

5 km