California Triathlon Calendar 2025-2026

Oct

19

Sunday

Mission Inn Run

Riverside, California

5 km 10 km 13 mi

Oct

19

Sunday

Ghostly Gallup Half Marathon

Long Beach, California

5 km 10 km 10 mi 13 mi

Oct

19

Sunday

Lafayette Res Run for Education

Lafayette, California

2 mi 5 km 10 km

Oct

19

Sunday

Mermaid Run San Francisco

San Francisco, California

5 km 10 km 10 mi

Oct

23-25

Th - Sa

Weekend at Burney

Burney, California

Backyard Ultra 4 mi 13 mi ... 24 hr 48 hr

Oct

25

Saturday

CASA of Kern County Superhero Run

Bakersfield, California

5 km 10 km

Oct

25

Saturday

Twilight's Last Gleaming Cross Country Challenge

Ventura, California

Trail Run

Oct

25-26

Sa - Su

Malibu Moves Half Marathon

Malibu, California

5 km 10 km 13 mi

Oct

25

Saturday

Monster Mash Dash Halloween Run

Fresno, California

5 km

Oct

25

Saturday

Range Of Light Trail Races

Bishop, California

Trail Run 5 km 10 km 33 km 50 km

Oct

25

Saturday

San Diego HFTC 5k

San Diego, California

5 km

Oct

25

Saturday

Trail Run At Sly Park - Fall

Pollock Pines, California

Trail Run 5 km 10 km ... 26 mi 50 km

Oct

25

Saturday

Haunted Hills 10K Redwood City

Redwood City, California

Trail Run 5 km 10 km

Oct

25

Saturday

FIT FALL Halloween Harvest 10K

Huntington Beach, California

5 km 10 km

Oct

25

Saturday

Pinkathon Challenge for Breast Cancer

San Francisco, California

5 km 10 km ... 26 mi 50 km

Oct

25

Saturday

Big Sur River Run

Monterey County, California

5 km 10 km

Oct

25

Saturday

Oakland Hills Trail Run

Oakland, California

Trail Run 10 km 13 mi 35 km

Oct

25

Saturday

Napa Fall Wine Country Marathon

Calistoga, California

Trail Run 10 km 13 mi 26 mi

Oct

25

Saturday

Miles for Migraine - San Francisco

San Francisco, California

2 mi 5 km

Oct

25

Saturday

Monster Dash Half Marathon - Long Beach

Long Beach, California

5 km 10 km 15 km 13 mi