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 62 exciting races across the region. Find your next race in California below and join the running community at these great events!
February 2027
Multi-discipline event at Rose Bowl Stadium on February 7, 2027 featuring triathlon, duathlon, relays and a 5k with youth and junior categories.
March 2027
Collegiate triathlon in Northern California hosted by the Stanford University Triathlon Team with a 750 m swim, 20 km bike and 5 km run on March 7, 2027.
Experience an early season triathlon in Long Beach featuring a calm bay swim and scenic oceanfront paths. Choose from a 70.4 mile long course or a sprint distance with individual and relay options.
Triathlon and running event in Exeter, California offering short and long triathlon distances plus 5K and 10K, USAT sanctioned.
Duathlon and 5K events at Woodward Park in Fresno on March 27, 2027, with in-person and virtual options, race shirts, medals, food, and awards.
Monthly updates for California
Get new running races (and updates) in your inbox every month.
April 2027
IRONMAN 70.3 Oceanside in Oceanside, CA features a sheltered harbor swim, a hilly bike through Camp Pendleton, and a rolling run along the Pacific finishing on the Strand.
A lakeside triathlon at Granite Beach with swim, bike on closed roads, and shoreline runs; wetsuits are recommended and race entries include gear and a post-race meal.
Triathlon at Lake Berryessa in Napa Valley on April 10, 2027, offering Open, Sprint, Olympic and Long Course distances with lakeside scenery and local wildlife.
A multi format triathlon event at Lake Perris offering six Olympic and six Sprint race options plus standalone 5K and 10K runs.
Multiple triathlon distances plus 5k and 10k runs at Millerton Lake in Friant CA, capped at 200 participants; triathlons require USAT membership.
A multisport festival at Lake Mission Viejo on April 25, 2027 offering triathlon, duathlon, aquabike, a 5K, mini sprint and kids races with USAT sanctioning.
Multi-discipline event at Lake Woollomes near Delano CA with sprint and Olympic triathlons, duathlon, aquathlon, aquabike, 5K/10K runs and virtual options.
May 2027
A multi-option triathlon event at Harbor Cove Beach, Ventura on May 2, 2027, offering 12 sprint and Olympic formats plus standalone swims and runs.
Spring Sprint Triathlon in San Diego on May 2, 2027 features triathlon, duathlon, aquabike, a 5K and kids races with USAT sanctioning and event amenities.
Olympic-distance triathlon at Granite Beach with a 1.5K swim, 40K bike and 10K trail run, USAT sanctioned and limited to 300 athletes.
Sprint and Super Sprint triathlons at Folsom Lake with lake swim, road bike on closed park roads, and a trail run plus race perks and age group awards.
Weekly multi-discipline races at Leadbetter Beach Park in Santa Barbara from May 19 to August 25, 2027, featuring a 5 km run, multiple swim distances, and kids races.
IRONMAN 70.3 Northern California in Redding features a swim in Whiskeytown Lake, a net downhill bike course and a flat shaded run on the Sacramento River Trail.
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.