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!
July 2026
Coveathlon #3 in Newport Beach on July 30, 2026 features a mix of swim and run events including a combined 1K swim plus 5K run, standalone swim and run distances, and a relay. Registration fees vary by event and awards are given after each race.
August 2026
A multi-format swim and run event in Newport Beach on August 6, 2026 offering 1K swim, 5K and 10K runs, a combined 6K swim+run and a relay option. Entries include a race t-shirt, swim cap, free photos, chip timing and awards after each race.
Tri for Real at Rancho Seco Park on August 8, 2026 features Olympic-distance, Aquabike and Super Sprint options with USAT sanctioning for the Olympic-distance series and Aquabike plus age group series championship prizes.
Entry level triathlon in Hermosa Beach with a 1/4 mile swim, 10 mile bike and 3 mile run along the Pacific on August 9, 2026.
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, including an adult aquathon and a youth Splash and Dash for ages 11 to 15. Timing chips are used and spectators are welcome.
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 triathlon at June Lake Beach on August 15, 2026, offering swim, bike, and run distances from kids through long course in a mountain lake setting.
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 features a swim at Whiskeytown Lake, a net downhill bike through Shasta County and a flat, shaded run on the Sacramento River Trail.
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.
On August 29, 2026 the Santa Barbara Triathlon & Beach Festival combines ocean swims, coastal bike courses and a beachfront finish with music and refreshments. Events range from one mile swims and 5K runs to multiple triathlon distances.
A women's triathlon and 5K in Nevada City on August 30, 2026, featuring individual and relay triathlon options plus a 3.1 mile run/walk. Registration fees support cancer treatment, women's health programs, and healthcare scholarships.
September 2026
A triathlon and duathlon at Lake Siskiyou Camp Resort on September 6, 2026 offering standard sprint distances, individual and relay entries, collegiate waves, and support for the Dunsmuir Rotary backpack food program.
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.