Diablo Trails Challenge

Saturday, April 4, 2026

Walnut Creek, California

Race Day

Saturday, April 4, 2026

Course

Loop

Also Offers

50K10K5K trail run

Registration

Race Website

Official race information

☀

Avg High

66°F

☽

Avg Low

45°F

☂

Precip

0.03 in

🍃

Wind

9.3 mph

68% humidity·Based on 5-year historical data

APR 4

Billy Goat Mountain Climb

APR 4

Golden Gate Headlands Marathon

APR 4

Hoppy Easter 5k, 10k, 15k, Half Marathon

APR 4

Run for Breast Cancer 5K/10K/13.1 LOS ANGELES

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Race Day

Saturday, April 4, 2026

Course

Loop

Also Offers

50K10K5K trail run

Registration

Race Website

Official race information