Altadena
Triathlon Calendar near Altadena 2026-2027
Monthly updates for Altadena
Get new running races (and updates) in your inbox every month.
Explore the top triathlons near Altadena for 2026-2027! We've gathered 5 exciting races in the area. Check out our detailed list below to find your next local race.
August 2026
A community triathlon in Hermosa Beach featuring a quarter mile ocean swim, a ten mile bike and a three mile run along the shoreline. The event is entry level with nearby pier and beach amenities.
October 2026
Cal Tri LA at Dockweiler State Beach in Playa Del Rey offers 18 event options on October 18, 2026, across Olympic, Sprint, and Youth Sprint formats, including triathlon, duathlon, aqua bike, swim run, and standalone swim and run distances.
November 2026
Two triathlon options in Long Beach on E Ocean Blvd, featuring open-water swims, out-and-back bike courses open to traffic, and stocked aid stations; registration includes timing, a shirt, medal, and post race food.
March 2027
Experience an early season triathlon in Long Beach featuring a calm bay swim and scenic oceanfront paths. Choose from a 70.4 mile long course or a sprint distance with individual and relay options.
September 2027
Supertri Long Beach on September 19, 2027 features SuperSprint, Sprint and Olympic triathlon distances along the Long Beach waterfront with individual and relay options.