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 58 exciting races across the region. Find your next race in California below and join the running community at these great events!
June 2027
Lakeside triathlon near Yosemite on June 5, 2027 offering Olympic and Sprint courses plus AquaBike and Duathlon options.
Tri for Real at Rancho Seco Park on June 5, 2027 features an Olympic distance triathlon, an aquabike and a super sprint with USA Triathlon sanctioning for the Olympic race and aquabike.
Ride and Tie and Equathon event in Cools, California on June 5, 2027, organized by AllWeDoIsRun with 2027 registration open.
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.
A multi-event triathlon day at Castaic Lake on June 19 2027 offering sprint and Olympic swim bike and run options at the Paradise Cove venue.
Monthly updates for California
Get new running races (and updates) in your inbox every month.
Weekend triathlon weekend in Sonoma County with sprint and Olympic options, swims at Johnson's Beach, a bike on River Road and finishes through the La Crema vineyards.
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 multi-leg race on the American River Parkway with a 5.8 mile run, 12.5 mile bike and 6.1 mile paddle plus individual and relay 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.
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.
USAT sanctioned triathlon at June Lake, CA, set among mountain peaks with swim, bike, and run options from a kids race up to a long course.
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.
Experience a historic multisport festival in Santa Barbara featuring ocean swims, technical cycling, and beachfront runs with views of the Channel Islands and Santa Ynez Mountains.
Community running and cycling event at Dockweiler Beach on August 29, 2027, featuring 13K, 5K, kids run, bike rides, duathlons and virtual options.
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
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.