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California Triathlon Calendar 2025-2026

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Explore the best triathlons in California for 2025-2026! Our updated list features 37 exciting races across the region. Find your next race in California below and join the running community at these great events!

July 2026
Jul
26
Su

Crescent City Triathlon

Triathlon
Jul
26
Su

Goleta Beach Triathlon

Triathlon
August 2026
Aug
9
Su

Hermosa Beach Triathlon

Triathlon
Aug
9
Su

Tri Santa Cruz

Triathlon
Aug
16
Su

San Diego Tri Series

Triathlon
Aug
23
Su

Millerton Madness Triathlon

Triathlon
Aug
23
Su

Sandman Tri

Triathlon
Aug
29
Sa

Santa Barbara Triathlon & Beach Festival

Triathlon
September 2026
Sep
6
Su

Mount Shasta Tinman Triathlon

Triathlon
Sep
13
Su

Shaver Lake Mile High Triathlon

Triathlon
October 2026
Oct
18
Su

Ironman California

Triathlon
Oct
18
Su

Lake Hodges Trail Duathlon

Duathlon
Oct
18
Su

Lake Evans Triathlon

Triathlon 5 km 10 km
Oct
18
Su

Cal Tri LA

Triathlon
Oct
25
Su

Finish The Run Santa Clarita

Multisport
November 2026
Nov
1
Su

Morro Bay Triathlon

Triathlon
Nov
1
Su

Cal Tri Newport Dunes

Triathlon
Nov
7
Sa

Fall Classic Triathlon

Triathlon