IRONMAN 70.3 Oceanside

Kick off the North American triathlon season with the quintessential California beach vibe at the Athletic Brewing IRONMAN 70.3 Oceanside on Saturday, 28 March 2026. This iconic event is a qualifier for the IRONMAN 70.3 World Championship and part of the prestigious IRONMAN Pro Series, attracting elite and age-group athletes to its legendary, athlete-approved course. The race begins with a unique, wave-protected 1.2-mile swim in Oceanside Harbor, followed by a challenging 56-mile bike ride through the scenic, restricted-access roads of Camp Pendleton Marine Corps Base, and culminates with a spectacular 13.1-mile run along the Pacific Ocean, finishing with a festive party on The Strand. Voted the 2nd Best IRONMAN 70.3 Run Course globally, it perfectly blends physical test with stunning scenery. With a walkable, vibrant host city and a laid-back yet electrifying atmosphere, it's the ultimate season-opening destination race. Registration is now open to lock in your spot for this world-class SoCal triathlon experience.