Donner Lake Triathlon

2026 brings the 44th Donner Lake Triathlon to Truckee, California. Set against the stunning backdrop of the Sierra Nevada, the Donner Lake Triathlon is one of California’s most beloved and longest-running triathlons. Held annually in Truckee, this iconic event brings athletes together for a challenging and unforgettable race in one of the region’s most beautiful alpine settings. The event offers race options for athletes of all ages and abilities, including the Half Triathlon (70.3), Olympic Triathlon, Sprint Triathlon, Kids Triathlon, Aquabike, and Duathlon. Each course showcases the region’s spectacular mountain scenery, from the crystal-clear waters of Donner Lake to scenic alpine roads and lakeside running paths.

Whether completing a full triathlon or participating in one of the alternate multisport formats, athletes experience a well-organized race that celebrates endurance, community, and the spirit of the Sierra. Known for its breathtaking scenery, supportive race atmosphere, and demanding yet rewarding course, the Donner Lake Triathlon offers an unforgettable experience for athletes of all levels. Whether racing for a personal best or simply embracing the adventure, the Donner Lake Triathlon delivers a world-class endurance event in the heart of the Sierra.

The Donner Lake Triathlon is owned and operated by Big Blue Adventure. Explore the full lineup of Big Blue Adventure events for Summer/Fall 2026 at BigBlueAdventure.com