In 36 days · Sun, Sep 6, 2026
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Sunday, September 6th, 2026
Diablo State Park (Mitchell Canyon Trailhead), Clayton CA
10 Miles · Half · Marathon · Ultra
54–81°F · low rain risk
See last 10 years
On this date: rain 0 of the last 10 years
2025
52–70°F
dry
2024
60–92°F
dry
2023
50–75°F
dry
2022
75–106°F
dry
2021
54–91°F
dry
2020
71–103°F
dry
2019
53–76°F
dry
2018
48–78°F
dry
2017
57–76°F
dry
2016
49–82°F
dry
Best months to race in California →
About this race
Race Overview
Mount Diablo provides spectacular views of the San Francisco Bay Area and surrounding valleys.
Course Details
- Distance Options: 4 mile course and longer events.
- Course Type: The 4 mile course is relatively flat and fast within Mitchell Canyon.
- Longer Events: Scenic and mountainous terrain.
- Measurement: Distances are accurately measured using a Rolatape® surveyor's measuring wheel.
Event Information
Join us for an exhilarating experience in one of California's iconic parks!
- Date: September 6, 2026
- Location: Diablo State Park (Mitchell Canyon Trailhead), Clayton, CA
- Registration: Sign up here
Course map
Train with a club
Run clubs near Clayton to train with before race day.
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