California
California Triathlon Calendar 2026-2027
Monthly updates for California
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in California for 2026-2027! Our updated list features 59 exciting races across the region. Find your next race in California below and join the running community at these great events!
April 2027
Triathlon at Lake Berryessa near Napa Valley on April 10, 2027, offering Open, Sprint, Olympic and Long Course distances with scenic lakeside and wildlife views.
Multi discipline triathlon day at Lake Perris on April 11, 2027 with twelve event options including sprint and Olympic swim bike run formats.
Multi-sport festival at Lake Mission Viejo on April 25, 2027 with Olympic and sprint triathlons, duathlon, aquabike, relays, a 5K, and youth races.
May 2027
Multiple triathlon, swim, bike and run events at Harbor Cove Beach in Ventura on May 2, 2027, featuring 12 event options and a recommended wetsuit for 59 F water.
Spring Sprint Triathlon in San Diego on May 2, 2027 features triathlon, duathlon, aquabike, a 5K and kids races with USAT sanctioning and event amenities.
Monthly updates for California
Get new running races (and updates) in your inbox every month.
Olympic-distance triathlon and aquabike at Granite Beach, Folsom Lake with a 1.5K swim, 40K scenic bike and 10K trail run.
Sprint and Super Sprint triathlons at Folsom Lake with lake swim, road bike on closed park roads, and a trail run plus race perks and age group awards.
June 2027
Lakeside triathlon near Yosemite on June 5, 2027 offering Olympic and Sprint courses plus AquaBike and Duathlon options.
Tri for Real at Rancho Seco Park on June 5, 2027 features an Olympic distance triathlon, an aquabike and a super sprint with USA Triathlon sanctioning for the Olympic race and aquabike.
Coolest Ride and Tie in Cools CA on June 5, 2027 features Ride and Tie and an Equathon, with 2027 registration open.
Sprint triathlon and duathlon at Rancho Seco Park in Herald CA, part of a three-race summer series with finisher medals, race shirts, and age group awards.
A multi-event race day at Castaic Lake on June 19, 2027 featuring 12 options from sprint swims and 5K runs to Olympic distance triathlons.
A weekend triathlon in Sonoma County with swim, bike and run courses from Johnson's Beach to La Crema Estate, offering sprint and Olympic options.
July 2027
Tri for Real at Rancho Seco Park offers 1.5K swim 40K bike 10K run plus aquabike and super sprint options with USAT sanctioning for the main races.
A summer triathlon and duathlon series at Rancho Seco Park with sprint distances, participant swag, finisher medals, and age group awards on June 6, July 11 and August 8 2027.
A multi-leg race on the American River Parkway with a 5.8 mile run, 12.5 mile bike and 6.1 mile paddle plus individual and relay divisions.
Swim run at Folsom Lake with short and long courses that start and end with swims, individual and two person team options, included gear and a post race BBQ.
August 2027
A USAT sanctioned triathlon at June Lake Beach framed by mountain peaks, with kids, sprint, Olympic and long course swim, bike and run options.
September 2027
Ocean swim and beachfront bike in Long Beach California on September 19, 2027 with SuperSprint, Sprint, and Olympic distances and fundraising for Children’s Hospital Los Angeles.