Name: Diablo Trail Run
Start: 2027-05-23
End: 2027-05-23
Location: Clayton

Races Offered

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

May 23, 2027

straighten

Distance — 0K

terrain

Type — Running

timer

07:50

sell

$0.00

10 Mi

May 23, 2027

straighten

Distance — 16.1K

terrain

Type — Running

timer

08:00

sell

$60.00

50K

May 23, 2027

straighten

Distance — 48.9K

terrain

Type — Running

timer

08:00

sell

$90.00

Half Marathon

May 23, 2027

straighten

Distance — 21.1K

terrain

Type — Running

timer

08:00

sell

$70.00

Marathon

May 23, 2027

straighten

Distance — 42.2K

terrain

Type — Running

timer

08:00

sell

$80.00

4 Mi

May 23, 2027

straighten

Distance — 6.4K

terrain

Type — Running

timer

08:15

sell

$50.00

Coastal Testing

May 23, 2027

straighten

Distance — 3.2K

terrain

Type — Running

timer

08:25

sell

$0.00

Weather History

These values represent the 3-year monthly averages for May 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

Things to Do Nearby

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Runner Reviews

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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