In 246 days · Sun, May 23, 2027
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Sunday, May 23rd, 2027
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 →
Race-day forecast · Sunday, May 23
Sunny · 51–66°F
Sunday, May 23starts near 51°F · 1% chance of rain · wind up to 14 mph
About this race
Event Information
- Date: 2027-05-23
- Location: Diablo State Park (Mitchell Canyon Trailhead), Clayton, CA
- URL: Diablo Trail Run
Race Description
- Scenic Views: Mount Diablo provides spectacular views of the San Francisco Bay Area and surrounding valleys.
- Course Details: The 4 mile course is relatively flat and fast within Mitchell Canyon.
- Longer Events: The longer events are mountainous and very scenic.
- Measurement Accuracy: Distances are accurately measured using a Rolatape® surveyor's measuring wheel.
Course map
Hotels for race weekend
Live prices near the start line, May 22 – 24, 2027.
Train with a club
Run clubs near Clayton to train with before race day.
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