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

Races Offered

Kid's Run (6yo & younger, 50yd dash) - Free!

Sep 06, 2026

straighten

Distance — 50 Yards

terrain

Type — Running

timer

07:50

sell

$0.00

10 Mi

Sep 06, 2026

straighten

Distance — 10 Miles

terrain

Type — Running

timer

08:00

sell

$60.00

50K

Sep 06, 2026

straighten

Distance — 30.4 Miles

terrain

Type — Running

timer

08:00

sell

$90.00

Half Marathon

Sep 06, 2026

straighten

Distance — 13.1 Miles

terrain

Type — Running

timer

08:00

sell

$70.00

Marathon

Sep 06, 2026

straighten

Distance — 26.2 Miles

terrain

Type — Running

timer

08:00

sell

$80.00

4 Mi

Sep 06, 2026

straighten

Distance — 4 Miles

terrain

Type — Running

timer

08:15

sell

$50.00

Coastal Testing

Sep 06, 2026

straighten

Distance — 2 Miles

terrain

Type — Running

timer

08:25

sell

$0.00

Weather History

These values represent the 3-year monthly averages for September in Clayton.

thermostat Temperature

15.0° / 28.3°

wb_sunny Feels like

13.1° / 25.7°

light_mode Avg sunshine hours

11h 4m

water_drop Avg rainfall

0.1 mm

ac_unit Avg snowfall

—

air Avg wind speed

12.6 km/h (Gentle breeze)

opacity Sweat loss rate

High

terrain Course conditions

Hard and dry surface

sunny Max UV Index

Moderate (5.0)

humidity_mid Humidity

61.2%

wb_twilight Sunrise

06:49

nightlight Sunset

19:14

About Clayton

Learn more about the host city, Clayton.

Clayton is a small suburban town in the East Bay of the California Bay Area, in Contra Costa County.

Hotels & Places to Stay

Runner Reviews

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Other 1 Mile 5K 10K Half-Marathon

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Diablo Trail Run

About the Event

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.)

Races Offered