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 68 exciting races across the region. Find your next race in California below and join the running community at these great events!
March 2026
Experience a meaningful multi sport tradition at UCSB featuring a sprint triathlon relay and 5K run. Join a community event dedicated to the memory of a local athlete while exploring a scenic coastal campus course.
Experience a unique triathlon featuring a harbor swim, a bike course through the Camp Pendleton military base, and a scenic run along the Pacific Ocean. This Southern California event concludes with a festive finish on the beach.
April 2026
Experience a scenic multisport event at Folsom Lake featuring triathlon, aquabike, and swim distances for various skill levels. Participants enjoy shoreline run courses and receive a finisher hat alongside a hot post race meal.
Experience a versatile multisport event at Lake Perris featuring 18 race options including triathlon, duathlon, and swimming across Olympic and Sprint distances.
The Millerton Lake Crows Nest event features triathlon and running races. Courses include lake swims, hilly bike segments, and trail runs. Triathlon participants receive a finisher's medal, shirt, and free photos.
Voted a top ten triathlon for newcomers, this event at the Rose Bowl features a reverse triathlon, duathlon, and 5k run. It is the perfect opportunity to test your fitness and support local charities in Pasadena.
Multisport and run events at Lake Woollomes near Delano CA on April 26, 2026 featuring sprint and Olympic triathlon distances plus 5K and 10K run options with lake swim, road bike, and mixed surface run courses.
The Orange County Multi-Sport Festival offers a range of races from triathlons to a 5K, all centered around Lake Mission Viejo. The course features a lake swim, a bike on paved roads, and a run on mixed terrain. Each participant gets a shirt, medal,..
May 2026
Experience an iconic endurance weekend at Lake San Antonio with triathlons, trail runs, and a gravel race. Enjoy a full festival featuring camping, live music, yoga, and an outdoor expo in the heart of California.
Experience a coastal multi sport event at Harbor Cove Beach with twelve race options including triathlons, runs, and swims. Choose between Olympic or Sprint distances in this scenic California beach community.
Experience a premier multi sport festival at Mission Bay San Diego featuring triathlons, duathlons, and a 5K run. Enjoy a calm bay swim and fast flat courses perfect for achieving a personal best.
Experience a sanctioned Olympic distance triathlon at Granite Beach featuring a lake swim scenic country road cycling and a multi terrain trail run limited to 300 participants.
Experience a scenic multisport event at Folsom Lake featuring lake swims, closed road cycling, and lakeside trail runs. Choose between Sprint and Super Sprint distances for individual or relay participation.
Experience a summer of fitness at Leadbetter Beach with a variety of running and swimming events. Enjoy an evening atmosphere featuring live music, a beer garden, and activities for all ages in Santa Barbara.
The VI TRI brings a Super Sprint triathlon and a 5k run to El Diamante High School in Visalia. This USAT-sanctioned event features a pool swim, a bike leg to the local airport, and a campus run. Participants receive a shirt, medal, and a post-race me..
Experience a unique multisport day in Lotus, California featuring a 10 mile trail run followed by a whitewater rafting adventure on the South Fork American River.
Experience a historic triathlon tradition at the scenic Bass Lake near Yosemite National Park. Choose from Olympic, Sprint, Duathlon, or AquaBike distances in a beautiful Sierra Nevada mountain setting.
Tackle a super-sized sprint triathlon at Uvas Reservoir. The event features a 0.75-mile swim, a 16-mile country road bike, and a 5-mile run, plus other multisport options. It includes full race support, a finisher's medal, and a post-race brunch.
June 2026
Experience a grassroots aquathlon and trail run at the Stevens Creek Reservoir outside Cupertino. Participate in open water swims or trail races in a community setting that welcomes spectators and dogs.
Experience the Ride and Tie Association West Region Championship in Cool, California. Choose between Ride and Tie or Equathon formats with course distances ranging from 9 to 21 miles on scenic trails.