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Triathlon Calendar near Oceanside 2025-2026

Explore the top triathlons near Oceanside for 2025-2026! We've gathered 2 exciting races in the area. Check out our detailed list below to find your next local race.

March 2026
Mar
28
Saturday

Ironman 70.3 Oceanside

Triathlon
Join the iconic IRONMAN 70.3 in Oceanside CA for a scenic coastal course and high energy race day. Onsite PLAYTRI bike services handle rentals, tune ups and build and pack options so you can focus on the swim bike run.
July 2026
Jul
18-19
Sa - Su

San Clemente Ocean Festival

Multisport
Celebrate sun and surf at the San Clemente Ocean Festival with a 5K beach run, one mile swim and the Dolphin Dash kids run. Family fun, surf contests, live music and vendors plus free parking and shuttle from San Clemente High School.
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