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 45 exciting races across the region. Find your next race in California below and join the running community at these great events!
February 2026
Join the UWS Race on the Base on Feb 28, 2026 at the Joint Forces Training Base in Los Alamitos for a standout reverse sprint triathlon with run, bike, swim order and a separate 5K run walk. Relay teams of three welcome.
March 2026
Celebrate the 20th Pasadena Triathlon at the iconic Rose Bowl on March 7, 2026, featuring tri, du, reverse, junior races and a charity Angel 5k supporting Angel City Sports. All ages and adaptive athletes are welcome for a fun, festive day of racing.
Take on the Bayshore 70.4 or a beginner friendly sprint in Long Beach with a calm Bay swim and scenic oceanfront course. Individual and relay entries, chip timing, finisher medal and post race food make this an ideal early season race.
Dive into the March Triathlon Series at scenic Lopez Lake in Arroyo Grande on March 7, 2026. Choose Sprint or Olympic distances and race amid lush canyons and high water levels for a fast and beautiful California course.
Join the Rocky Hill Triathlon in Exeter on March 14 featuring short and long tri options plus 5k and 10k, pool swims, Rocky Hill climbs and a stadium finish. All finishers get a hoodie and enjoy postrace perks supporting local parks.
April 2026
Challenge yourself at the 2026 Cal Tri Lake Perris on April 12, 2026 with Sprint, Olympic and Youth Sprint multisport and run options for all levels. Enjoy a scenic lakeside course with camping and family friendly vibes.
Race at scenic Millerton Lake on April 12, 2026 with triathlon, aquabike, duathlon and 5K and 10K run options for all levels. Limited to 200 participants for a friendly day of racing with medals, shirts and photos.
Dive into the Grapes of Wrath Triathlon, 5k & 10k at Lake Woollomes in Delano, CA on April 26, 2026. Choose from triathlon, duathlon, aquathlon, run or virtual options and enjoy scenic lake swims, flat bike routes and mixed trail runs.
Dive into the Orange County Multi Sport Festival in Mission Viejo for lake swims, scenic bike and run courses, and events from kids triathlon to Olympic distance. Finish strong with a souvenir shirt, medal, and post race refreshments.
May 2026
Join the 2026 Cal Tri Ventura on May 3 at Harbor Cove Beach in Ventura, CA for a seaside multisport festival. Choose from Olympic or Sprint triathlons, RunBikeRun, SwimBike, SwimRun, swims and 5K or 10K runs, open to ages 18 and older.
Dive into the scenic Folsom Lake International Triathlon at Granite Beach, featuring an Olympic distance swim, country road bike and trail run. Limited to 300 athletes, the race includes custom socks, a finisher's hat and USA Triathlon sanctioning.
Visalia Tri at El Diamante High on May 23 is canceled due to low turnout. Registered athletes will receive refunds or transfers, and organizers hope to return with the community friendly super sprint and 5k next year.
A one-day event combining a supported 10 mile group trail run along the South Fork American River with a full day of guided whitewater rafting. Includes shuttle service, aid station with Hammer Nutrition, lunch on the river, and a snapback trucker ha..
Race the Spring Sprint at Uvas Reservoir on May 31, 2026: a scenic 0.75 mile swim, 16.2 mile bike and 5 mile run with AquaBike, duathlon, open water swim and a kids run. Fully supported with chip timing, awards, race shirt and brunch.
June 2026
A regional Ride and Tie Association championship held June 6, 2026 in Cool, CA. Features Ride and Tie courses of 21 miles and 9 miles and Equathon formats with mixed rider and runner distances.
Join the 2026 Cal Tri at Castaic Lagoon on June 20 for a full day of triathlon fun with Sprint and Olympic distances plus youth races, many free under the Cal Tri Kids Race Free program. Swim, bike, and run courses suit all levels.
Dive into scenic Russian River racing at Cal Tri La Crema on June 28, 2026, with sprint and Olympic triathlon options, standalone swims and a 5K through La Crema Estate. Finish strong and enjoy a complimentary wine pour for participants 21 and over.
July 2026
Enjoy the San Clemente Ocean Festival on the beach with athletic contests like a 5K run, 1 mile swim and Dory boat races, plus family favorites including a free concert, sand sculpting and youth activities. Perfect for athletes and families seeking s..