Diablo Summit Stomp
OCT
17
2026
Trail race at Mount Diablo in Walnut Creek on October 17, 2026 offering 30K, half marathon, 10K and 5K on hilly trails with possible mud and creek crossings.
Sat 17 Oct 2026
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 race on October 17, 2026, in Walnut Creek at Mount Diablo. All courses are run on trails and include some hills. Depending on the weather, courses may include mud and creek crossings.
Distances offered:
- 30K
- Half Marathon
- 10K
- 5K
Walkers and hikers are welcome in all distances. The organizer describes the event as friendly to first-time trail runners and experienced runners. Race services and event features include bib pick-up, shirts and awards, volunteer opportunities, published results, and photos provided for free by volunteer photographers. Visit the organization's website for the most recent information.
30 km
30k
Half Marathon
Half Marathon
10 km
10k
5 km
Events nearby
A cross country meet at Radke Martinez Regional Shoreline on October 24, 2026, featuring three races of about 4.1 miles over grass, dirt, and path surfaces.
A fundraiser in Joaquin Miller Park featuring a 5 km trail race and a 1 mile fun run to support Oakland Tech PTSA and student programs.
Experience a scenic trail run around the Lake Chabot reservoir and hills. With distances from a 50 yard kids dash to a 50K ultramarathon there is an option for everyone at this Castro Valley event.