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 64 exciting races across the region. Find your next race in California below and join the running community at these great events!
July 2027
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.
Monthly updates for California
Get new running races (and updates) in your inbox every month.
CVC San Diego Triathlon and 5K at Chula Vista Bayfront on August 15, 2027 offers sprint, international, youth races, relays, clinics, and a post race garden.
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.
A women's triathlon and 5K run or walk in Nevada City supporting cancer treatment access and healthcare scholarships through a swim, bike, and run course.
September 2027
A Lake Siskiyou triathlon near Mount Shasta with a 740 yard swim, 16 mile bike and 3.2 mile run; proceeds support Dunsmuir Rotary's weekend food program.
A Folsom Lake triathlon featuring lake swims, draft legal gravel bike courses and single track trail runs with Sprint and Olympic options.
Multisport event at Liberty Station featuring triathlon, aquabike, duathlon, aquathlon and a 5K with swim, bike and run courses around San Diego Bay.
Multiple race formats at Camp Edison Shaver Lake on September 12 2027, including triathlon, aquabike, duathlon, 5K, 10K and virtual options.
IRONMAN 70.3 Santa Cruz on September 12, 2027 features a 1.2 mile ocean swim, 56 mile bike on Highway 1, and a 13.1 mile coastal run to a beach finish.
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.
Multisport race at Crystal Cove State Park offering Sprint and Olympic triathlons, duathlons, aquabikes, relay options, and a 5K beach and trail run in Orange County, CA.
October 2027
A multisport event at Dockweiler State Beach on 2027-10-03 with 18 options including sprint, Olympic, youth swim and run distances.
Multidistance triathlon and 5K at Mission Bay and Fiesta Island in San Diego on October 10 2027, with sprint, international, youth, relay, duathlon and aquabike options.