Diablo Summit Stomp Half Marathon, 10k/5k
Walnut Creek, California, United States
Oct, 2027 (TBD)
5k, 10k, 30k, Half-marathon
Race Report
There were many people around me on the course and it was great for camaraderie and motivation.
2016 Diable Summit Stomp
Race Information
Just across the East Bay hills from San Francisco, Mt. Diablo beckons! Come stomp to the peak at just under 4000 feet. Choose from a wide range of race distances: 5k, 10k, Half Marathon, and 30k are all on tap.
All courses are on trails. While there are some hills, this event, like all Brazen Racing runs, is very friendly to first-time trail runners and experienced runners alike. Depending on the weather, all distances may include mud and creek crossings!
Walkers/hikers are welcome in all distances. Age group awards will be given to the top 3 finishers in 5-year categories (smaller categories for younger ages).
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👍 Run Pick of the Month: Santa Cruz Marathon
📍Santa Cruz - Sunday October 25, 2026
😄 Why We Like This Run
✅ Three epic distances
✅ A world-class coastal course
✅ The ultimate surf-town vibe
Experience the magic of the Pacific coastline at the Santa Cruz Marathon, a brand-new race event celebrating the heart and soul of California’s favorite surf town. Trade the concrete jungle for ocean breezes and iconic scenery and experience a race day like no other.
Whether you're lacing up for your first race or chasing a personal best, you're invited to be part of history. Join in the inaugural 2026 edition and secure your place in the record books with an exclusive, one-time inaugural finisher medal.
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Race Facts
Race Size: 500 - 1,000
Course Type: Trail
Boston Qualifier: No
Kids Run: No
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