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 66 exciting races across the region. Find your next race in California below and join the running community at these great events!
June 2027
A Ride and Tie and Equathon event on June 5, 2027 in Cools CA, organized by AllWeDoIsRun with 2027 registration listed as open.
A multi-stage triathlon in San Francisco with a 1.5 mile swim from Alcatraz, an 18 mile bike through city hills, and an 8 mile run along the Bay.
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.
Vi Tri at El Diamante High School in Visalia offers a USAT sanctioned Super Sprint triathlon plus relay, virtual and a 5k run with shirt, finisher medal and post race meal.
A multi-event triathlon day at Castaic Lake on June 19, 2027 with sprint and Olympic swim, bike and run options across a lakeside venue.
Monthly updates for California
Get new running races (and updates) in your inbox every month.
Two day triathlon weekend in Sonoma County with a Russian River swim, scenic River Road bike, and a vineyard run finish at La Crema Estate.
45th Annual San Diego International Triathlon on June 27, 2027 in downtown San Diego, offering swim-bike-run events, relays, aquabike, duathlon and a 5.6K run; beer garden benefits Father Joe's Villages.
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 sprint triathlon and a duathlon at Rancho Seco Park on July 11, 2027 with age-group awards, finisher medals, post-race refreshments, and on-site camping.
A 7th annual multi-leg triathlon on the American River Parkway featuring a 5.8 mile run, 12.5 mile bike and 6.1 mile paddle with individual and team 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.
A weekend sprint pool triathlon in Crescent City, CA with adult triathlon and duathlon, relay teams, and age-group kids races on July 25 to 26, 2027.
A USA Triathlon sanctioned event at Fletcher Cove on July 25, 2027 offering sprint triathlon, duathlon, aquabike, aquathlon and a standalone 5K along the Pacific coast.
August 2027
A summer triathlon series at Rancho Seco Park featuring Olympic-distance triathlon, Aquabike and a Super Sprint with award categories and on-course aid stations.
Lake swim, road bike and trail run events at Rancho Seco Park with age-group awards, finisher items, and on-site packet pickup.
Multisport race in Santa Cruz on 08/08/2027 featuring triathlons, aquabike, aquathlon, duathlons, open water swims, relays, and 5K/10K runs.
Sprint triathlon at Granite Beach with a 3/4 mile swim, two laps on the 10 mile bike and a 5 mile trail run, held as the NorCal/Nevada tri club championship.
USAT sanctioned Super Sprint triathlon, 5k, relay and virtual options at Millerton Lake featuring an in-water swim, rolling hills on the bike, and an asphalt run.
Oceanfront triathlon at Santa Barbara's East Beach with ocean swims, varied bike courses, and a beachfront finish with music.
Beachside event in Playa Del Rey offering 13K, 5K, kids runs, virtual races, a 14 Mile bike ride and duathlon options while fundraising for Evelyn’s BFF.