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California Races in May

Browse upcoming marathons, half marathons, 5Ks, 10Ks, trail runs, and triathlons happening in May.

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Running & Triathlon Races

May 1, 2027

The Hoag OC Marathon Running Festival

Newport Beach
May 1, 2027

Fresno Urban Run

Fresno
May 1, 2027

Santa Clarita Trail Race

Santa Clarita
May 2, 2027

Avenue of the Giants Marathon

Humboldt
May 2, 2027

Bay Bridge Half Marathon

Oakland
May 2, 2027

Sombrero Marathon

Santa Clarita
May 2, 2027

2026 Cal Tri Ventura

Ventura
May 8, 2027

Yosemite Half Marathon

Yosemite
May 8, 2027

Santa Barbara Wine Country Half Marathon

Santa Barbara
May 8, 2027

Folsom Lake International Triathlon

Folsom
May 8, 2027

Grizzly Peak Trail Run

Berkeley
May 8, 2027

Stinson Beach Muir Woods Marathon

Marin
May 15, 2027

La Jolla Half Marathon & 5K

San Diego
May 15, 2027

14th Annual Luc's Run

May 16, 2027

Bay To Breakers

San Francisco
May 16, 2027

The Venice Beach Half Marathon & 5K, presented by goodr

Venice
May 22, 2027

Beachfront Run Half Marathon, 10K, 5K & Kids Run

Ventura
May 23, 2027

Diablo Trail Run

Walnut Creek
May 23, 2027

IRONMAN 70.3 Northern California

Redding
May 23, 2027

Menlo Park Kids Triathlon

Menlo Park