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 62 exciting races across the region. Find your next race in California below and join the running community at these great events!
August 2026
A beginner friendly triathlon in Hermosa Beach, California on Sunday August 9, 2026, featuring a 1/4 mile ocean swim, 10 mile bike and 3 mile run along the shore. Presented by Libertana.
A multisport event in Santa Cruz on August 9, 2026 featuring international and sprint triathlons, aquabike, aquathlon, duathlon, open swims and a 5 km run, plus relay teams, special category rules and participant awards.
A triathlon and duathlon at Rancho Seco Park featuring a lake swim, road bike course, and dirt trail run, with age-group and overall awards, finisher items, and on-site camping at the venue.
Open-water swims and trail runs at Stevens Creek Reservoir and Stevens Creek Canyon on 08/13/2026. Adult and youth aquathons run alongside standalone swim and 5k options.
A triathlon at Lake Almanor on August 15, 2026 with run, bike, and kayak or paddleboard legs; offered as solo, relay, or virtual entries. Registrations support residential housing and therapeutic services for child survivors through Courage Worldwide..
A multi race event in Chula Vista on August 16, 2026 featuring triathlon, duathlon, aquabike, relays, youth races and a 5K. It is Event 2 of the San Diego Triathlon Series and part of the Triple Crown.
IRONMAN 70.3 Northern California in Redding on August 16, 2026 is a swim, bike and run triathlon that starts at Whiskeytown Lake and continues through Shasta County. The bike has net downhill sections and the run follows the flat, shaded Sacramento R..
A sprint triathlon at Granite Beach, Folsom Lake SRA on August 22, 2026 featuring a 3/4 mile swim, an 11 mile two lap bike course, and a 5 mile trail run, with club and age group awards.
Millerton Madness Triathlon at Meadow Campground in Friant on 08/23/2026 combines a USAT sanctioned Super Sprint triathlon, a 5k road run, relay teams, and virtual triathlon and run options.
Experience one of Santa Cruz County's oldest triathlons at Seacliff State Beach. This USAT sanctioned event features a unique swim around a historic cement ship and supports local lifeguard and youth water safety programs.
A longstanding triathlon at East Beach in Santa Barbara featuring ocean swims, mountain-framed bike routes, and a beachfront run with music and refreshments. Multiple race options include relays, aquabike, and family events.
September 2026
A sprint-distance triathlon at Lake Siskiyou near Mount Shasta featuring a 740 yard swim, a 16 mile bike and a 3.2 mile run. A portion of registration proceeds supports the Dunsmuir Rotary Club and Wildcat Weekender.
A triathlon in Bear Valley, CA on Sep 6, 2026 with a 600 yd swim, 10.5 mile bike and 3.4 mile run. The bike uses three loops and the run one loop; wetsuits are allowed and water is provided on the run.
A multi-discipline race day at Liberty Station in San Diego on September 12, 2026. Events include Olympic and Sprint triathlons, aquabike, duathlon, aquathlon, and a 5K run along the waterfront.
A gravel triathlon at Granite Beach, Folsom Lake with lake swims, off road gravel bike courses and trail running. Sprint and Olympic distances are USAT sanctioned and there is a non USAT SUP and kayak sprint option.
IRONMAN 70.3 Santa Cruz is a half distance triathlon in Santa Cruz, California featuring a 1.2-mile ocean swim, a 56-mile bike along Highway 1, and a flat half-marathon finish on the beach. The 2026 edition is set for September 13.
Experience a multisport challenge at Shaver Lake with triathlon, duathlon, and running events held at Camp Edison. Enjoy hilly bike routes and scenic trail runs followed by a tri tip lunch and finisher celebrations.
Experience a scenic multisport event at Crystal Cove State Beach featuring swim legs in the Pacific Ocean and a closed bike course on the Pacific Coast Highway. Choose from triathlon duathlon aquabike or trail run options.
A 12 hour team adventure race based in Sausalito that combines trekking, mountain biking and paddling. Teams navigate by map and compass to collect checkpoints across the Marin Headlands, Angel Island and San Francisco Bay.
A community super sprint triathlon in Albany, California featuring pool swim, bike and run courses for adults and children, with proceeds supporting Albany Middle and High School athletics and programs. The event is entirely volunteer run.