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Diablo Trail Run

Name: Diablo Trail Run
Start: 2026-09-06
End: 2026-09-06
Location: Clayton

Clayton, United States • 6 Sep 2026

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.

United States California Clayton

Race information

Website

30 mi

50k

26 mi

Marathon

13 mi

Half Marathon

10 mi

10 Mi

4 mi

4 Mi

Coastal Testing

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday Jul 25

Dirty Dozen Endurance Run

Pinole

Backyard Ultra

3 mi

Trail endurance races at Point Pinole Regional Shoreline offering 12 hour, 6 hour and 3 hour options for individuals or teams of two or three. The 3.37 mile loop runs mostly on dirt fire trails with shoreline views and eucalyptus groves.

Saturday Aug 1

Community Hike & Trail Run Series - Richmond

Montalvin Manor

Monthly community hikes with an optional trail-run pace in Richmond, organized by FIERCE Advocates with Moving Forward and Richmond Run Club. Route details and gear recommendations are shared with registrants ahead of each meetup.

Sunday Aug 2

Skyline 50k Endurance Run

Castro Valley

Half Marathon

50 km

Trail races of 50K and 21K in Castro Valley that start and finish at Lake Chabot Marina. Organized by Scena Performance, the event features community volunteer aid stations, finisher swag, GPX files, and UTMB indexing.

Saturday Aug 8

Bear Creek Run

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.