Stomp To The Summit of Mount Diablo!

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 awarded to the top 3 finishers in 5 year categories (smaller categories for the younger ages). 

Registration Fees


5K No shirt



10K No shirt


Half Marathon

Half Marathon No shirt



30K No shirt


Remote Runner

Remote Runner No shirt


Event Schedule

  • November 4 7:45 AM PDT - Early Half Start (for those walking the half marathon, planning to take longer than 3.5 hours)

  • November 4 8:15 AM PDT - 30K

  • November 4 8:30 AM PDT - Half Marathon

  • November 4 9:00 AM PDT - 10K

  • November 4 9:15 AM PDT - 5K

Contact Information

Event Location

Castle Rock Road, Walnut Creek, CA, United States

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