California
California Triathlon Calendar 2026-2027
Monthly updates for California
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Explore the best triathlons in California for 2026-2027! Our updated list features 68 exciting races across the region. Find your next race in California below and join the running community at these great events!
May 2026
Wildflower is a multi day festival at Lake San Antonio in Bradley, CA, May 1 to 3, 2026, that combines multiple triathlons, trail runs and an open water swim with music, food, camping and family friendly activities.
Multi-discipline races at Harbor Cove Beach in Ventura on May 3, 2026, offering 12 Olympic and Sprint event options including swim, bike, run and combined formats.
A multi-discipline triathlon festival at Mission Bay, San Diego on May 3, 2026 offering sprint and international triathlons, duathlon, aquabike, aquathlon, relays, kids races and a 5K with calm bay swim and flat bike and run courses.
Experience a sanctioned Olympic distance triathlon at Granite Beach featuring a lake swim scenic country road cycling and a multi terrain trail run limited to 300 participants.
Two short-course triathlons at Granite Beach Folsom Lake SRA on May 10 2026 with lake swims road biking and trail runs. Competitors receive a swim cap socks post-race refreshments and a finisher hat.
Experience a summer of fitness at Leadbetter Beach with a variety of running and swimming events. Enjoy an evening atmosphere featuring live music, a beer garden, and activities for all ages in Santa Barbara.
VI TRI at El Diamante High School is a USAT sanctioned event offering a super sprint triathlon, relay, virtual option and a 3.5 mile 5k run; participants receive a shirt, finisher medal and a post race meal.
A combined day of a supported trail run along the South Fork American River and a guided whitewater raft trip, with options for a 10 mile run or a 4 mile option, group transport to the river, lunch, and professional guides.
The 15th Annual Bass Lake Yosemite Triathlon on May 30, 2026 features Olympic and Sprint triathlon courses plus AquaBike and duathlon options at Bass Lake near Yosemite, with transition located at The Pines Resort and multiple nearby lodging choices.
A multi-format race at Uvas Reservoir on May 31, 2026 with a 0.75 mile swim, about 16 mile bike and a 5 mile run plus AquaBike, Duathlon, Aquathlon, open water swim and a kids run.
June 2026
Experience a grassroots aquathlon and trail run at the Stevens Creek Reservoir outside Cupertino. Participate in open water swims or trail races in a community setting that welcomes spectators and dogs.
Coolest Ride and Tie and Equathon in Cool, CA on June 6, 2026 serves as the Ride and Tie Association West Region Championship. Events include Ride and Tie courses of 21 miles and 9 miles and Equathon rider and runner combinations.
A three event triathlon series at Rancho Seco Park featuring an Olympic distance triathlon and aquabike sanctioned by USA Triathlon plus a Super Sprint. The event includes swim bike run courses, age group divisions, aid stations and finisher items.
Triathlon and duathlon races at Rancho Seco Park featuring a lake swim, road bike and dirt trail run. Distances include a half mile swim with a 16 mile bike and 3 mile run; the duathlon replaces the swim with a 1 mile run.
A multiformat triathlon event at Castaic Lake on June 20 offering Olympic, Sprint and Youth Sprint options with swim bike and run formats plus standalone swims and runs across 18 race choices.
Youth aquathlon in San Jose on June 20, 2026 featuring short run, swim, run races for ages 4 to 17. The event is USA Triathlon sanctioned and part of the 2026 USAT Youth State Series for Northern California.
A day of Olympic and sprint triathlon formats on June 28 in Sonoma wine country, centered at Johnson’s Beach with a 5k at La Crema Estate. Seven event options include swim, bike, and run choices for different distances.
The 44th San Diego International Triathlon on June 28, 2026 offers multiple race formats along the downtown waterfront with chip timing, a $2,000 top prize, and proceeds benefiting Father Joe's Villages.
July 2026
A multi-event swim and run meeting in Newport Beach on 07/09/2026 offering 1K swims, 5K and 10K runs, combined swim-run races and a relay, with race shirts, swim caps, photos, chip timing and awards.
Multi-distance triathlon event at Rancho Seco Park with USAT sanctioning for select races, on-site aid stations, transition rules, and series awards plus a raffle for series finishers.