Triathlon/Duathlon Events

The Pasadena Triathlon, Duathlon and 5k returns for the 20th year at the Rose Bowl! This family friendly event offers something for everyone, including a reverse triathlon, kids triathlon, and a 5k fun run.   This event is great for new triathletes (lots of first timers), intermediate athletes (looking to get faster)...

Spring Fling Duathlon Event Name: Spring Fling Duathlon • Date: Sunday, March 22, 2026 Location: Woodward Park, Fresno, CA Event Type: Duathlon (Run/Bike/Run)Host: Sierra Cascades Multisport Productions Description: A spring duathlon at Woodward Park featuring a run-bike-run format. A great early-season multisport race for athletes looking to kick off the year...

Millerton Lake Crows Nest Triathlon, 5K & 10K April 12, 2026 • Friant, CA The Millerton Lake Crows Nest Triathlon blends scenic lake swimming, rolling bike courses, and a mix of run options in a relaxed early-season multisport event at Millerton Lake State Recreation Area. Athletes can choose from Super...

Grapes of Wrath Triathlon April 26, 2026 • Delano, CA The Grapes of Wrath Triathlon offers a friendly and scenic multisport challenge in the heart of California’s Central Valley, with a swim in Lake Isabella followed by a rolling bike course and a run through agricultural landscapes. Athletes can choose...

Looking for a scenic multisport challenge? The Orange County Triathlon offers swim, bike, and run races at Lake Mission Viejo.

Looking for the ultimate endurance festival? The Wildflower Experience blends triathlons, trail runs, music, and lakeside camping.

VI TRI • Sun May 23, 2026 VI TRI Description — Vi-Tri (Visalia Triathlon) is returning to El Diamante High School in Visalia. Come out and have some fun! This USAT Sanctioned Event is a great local triathlon, perfect for the 1st timer and veteran athlete. Super Sprint Triathlon: 400...

Looking for an exciting race for your child? The Menlo Park Kids Triathlon 2025 is happening on June 1 an unforgettable experience!

Looking for a scenic race challenge? Join the Huntington Lake Triathlon with 5K & 10K races in the Sierra Nevada mountains.

Hermosa Beach Triathlon • August 9, 2026 • Hermosa Beach The Hermosa Beach Triathlon is a scenic, beginner-friendly sprint event set against the iconic Southern California coastline, perfect for triathletes of all experience levels. The course features a thrilling ¼-mile ocean swim in the Pacific, followed by a 10-mile bike...

Ready for an unforgettable race? Join Tri Santa Cruz 2025 on August 10 for a scenic, flat-course triathlon along the iconic California coast!

Looking for an epic race? Discover the June Lake Triathlon California’s stunning mountain triathlon set in the Eastern Sierra.

Looking for the ultimate Super Sprint Triathlon? Join the Millerton Madness Triathlon on August 24, 2025, for an exciting race!

Join the ultimate adventure at the Lake Tahoe Triathlon, where you will swim, bike, and run amidst breathtaking scenery. Register now.

Shaver Lake Mile High Triathlon • Sun September 13, 2026  Shaver Lake Mile High Triathlon Description — What will you find at the "Mile High" Triathlon? Bottle Opener Finisher's Medal Event T-Shirt Prizes and Giveaways Free Race Photos Tri-Tip sandwich lunch and bottled beverages Rosa Brothers chocolate milk Music Largest...

The San Diego Triathlon Challenge Weekend is CAF’s flagship inclusive sports and fundraising weekend, bringing together athletes of all abilities for triathlon events and community participation opportunities. The weekend features multiple ways to participate—including the signature triathlon (1-mile swim / 30-mile bike / 8-mile run), a 5K Walk + Roll,...