Diablo Trail Run

SEP
6
2026
Experience the natural scenery of Mount Diablo State Park through a variety of trail races. Runners can select distances ranging from 4 miles to a 50K with spectacular views of the San Francisco Bay Area.
Sun 6 Sep 2026
30 miles 26 miles 13 miles 10 miles 4 miles

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

Diablo Trail Run

The Diablo Trail Run takes place in Mount Diablo State Park, starting from the Mitchell Canyon Trailhead in Clayton, California. The park offers views of the San Francisco Bay Area and the surrounding valleys. The event features several trail race options that follow specific paths within the park's natural terrain.

Participants can choose from a range of distances measured for accuracy with a surveyor's measuring wheel:

  • 4 Miles
  • 10 Miles
  • Half Marathon (13.1 Miles)
  • Marathon (26.2 Miles)
  • 50K (30.4 Miles)
  • 2 Miles
  • 50 Yards (Kids Run)

The 4 Mile course is organized within Mitchell Canyon and consists of relatively flat terrain. In contrast, the longer race distances are mountainous. There is a dedicated run for children aged six years and younger, which consists of a 50 yard dash. All standard race events are classified as trail races, while the short children's dash and the 2 Mile testing event are categorized as running races. Visit the organization's website for the most recent information.

30 mi
50k
26 mi
Marathon
13 mi
Half Marathon
10 mi
10 Mi
4 mi
4 Mi
Coastal Testing

Events nearby

Bear Creek on August 8, 2026 offers 5K, 10K and a 13.32-mile half marathon in the Briones Regional Park area, with a virtual Remote Runner option. Entry windows and fees are listed for each race.
Trail races at Tilden Regional Park in Berkeley with distances from 10K to 50K, cupless aid stations about every 5–7 miles, and a 350-runner capacity.
Run through Bishop Ranch and San Ramon in this diverse racing event. Choose between a half marathon, 10k, 5k, or beer mile before enjoying unlimited tastings with your finisher medal.
Trail-based half marathon plus 5K and 10K with hills and scenic views in San Ramon on September 19, 2026; virtual entries available.
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