Triathlon Race Calendar in California, United States

May

02

Spring Sprint Triathlon & San Diego Tri Series 5K

San Diego, California, United States

$34.00 - $261.00

Triathlon Duathlon Aquabike Running

Triathlon-International Triathlon-Sprint 5K Aquabike (Swim/Bike) - Sprint +7

Jun

19

Cal Tri Castaic Lake - 6.19.27

Castaic, California, United States

Free - $500.00

Triathlon Aquabike Swimrun Swimming Running Duathlon

Sprint Triathlon Olympic Triathlon Youth Sprint Triathlon Sprint RunBikeRun (5km run, 15km bike, 5km run) +15

Jun

27

Cal Tri La Crema - 6.27.27

Guerneville, California, United States

$28.86 - $500.00

Triathlon Aquabike Swimming Running

Sprint Triathlon Olympic Triathlon Sprint SwimBike Sprint Swim (400 yards) +4

Aug

23

Millerton Madness Triathlon

Friant, California, United States

Triathlon Running

17.4K 5K +1

Aug

23

Sandman Tri

Aptos, California, United States

Triathlon Duathlon

38.6K 32.2K

Aug

15

Courage Triathlon 2026

Lake Almanor, California, United States

Triathlon

19.8K

Aug

09

Tri Santa Cruz

Santa Cruz, California, United States

Swimming Running

1.5K Ultra 5K

Aug

08

Hermosa Beach Triathlon

Hermosa Beach, California, United States

Triathlon

16.1K

Jul

26

Goleta Beach Triathlon

Goleta, California, United States

Triathlon Aquabike

14.5K 6.4K 9.7K

Jul

26

Crescent City Triathlon

Crescent City, California, United States

Triathlon Duathlon

5K 1.6K +1

Jul

26

2026 Solana Beach Triathlon & Duathlon and Solana Beach 5K

Solana Beach, California, United States

Triathlon Duathlon Aquabike Running

5K 6.4K +2

Jun

27

Open Water Swim Clinics

Santa Cruz, California, United States

Triathlon

Open Water Swim Clinic #1 - Open Water Skills Both Clinics - June 27 and July 25 Open Water Swim Clinic #2 - More Open Water Skills and Practice