Race Discovery
Diablo Trail Run
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Diablo Trail Run

Clayton, California, United States
Sep 06, 2026
Trail running

About this race

Mount Diablo provides spectacular views of the San Francisco Bay Area and surrounding valleys.  The 4 mile course is relatively flat and fast within Mitchell Canyon.  The longer events are mountainous and very scenic. (Distances are accurately measured using a Rolatape® surveyor's measuring wheel.)

Ready to test your limits? The Diablo Trail Run brings a highly anticipated 6.4K, 16.1K, Half-Marathon, Marathon, 48.9K, 3.2K to Clayton on September 6, 2026. Expect a fantastic route right in the heart of California.

Pick your distance

Trail running

4 Mi

Sep 06, 2026 6.4K 8:15 AM
$50.00
Open

10 Mi

Sep 06, 2026 16.1K 8:00 AM
$60.00
Open

Half Marathon

Sep 06, 2026 Half-Marathon 8:00 AM
$70.00
Open

Marathon

Sep 06, 2026 Marathon 8:00 AM
$80.00
Open

50K

Sep 06, 2026 48.9K 8:00 AM
$90.00
Open

Running

Coastal Testing

Sep 06, 2026 3.2K 8:25 AM
Free
Open

Weather Overview

These values represent the 5-year monthly averages for September in Clayton.

Temp (°C)
Minimum temperature (monthly average) 14.6° / Maximum temperature (monthly average) 28.5°
Feels Like (°C)
Minimum feels like (with wind chill; monthly average) 14.6° / Maximum feels like (with wind chill; monthly average) 30.5°
Wind (km/h)
Average wind speed (monthly average)
18.7
Precipitation (mm)
Average precipitation (monthly average)
1.7mm

About Clayton

Diablo Trail Run takes place in Clayton, California, United States. The local timezone is America/Los_Angeles.

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Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.

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