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 57 exciting races across the region. Find your next race in California below and join the running community at these great events!
July 2027
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.
Monthly updates for California
Get new running races (and updates) in your inbox every month.
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.
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 Folsom Lake triathlon featuring lake swims, draft legal gravel bike courses and single track trail runs with Sprint and Olympic options.
Multiple race formats at Camp Edison Shaver Lake on September 12 2027, including triathlon, aquabike, duathlon, 5K, 10K and virtual options.
A seaside IRONMAN 70.3 in Santa Cruz featuring a Pacific Ocean swim, a rolling bike along Highway 1, and a flat half marathon that finishes on the beach.
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.