One of the best! The Donner Lake Triathlon is a favorite California Triathlon of many triathletes. The venue, setting and course offer a truly beautiful and challenging experience. Join us this July in Truckee, California! 2025 brings the 43rd Donner Lake Triathlon (DLT) to Truckee, California. For years, the DLT has been and remains the favorite triathlon of many. It’s no wonder as the event features an epic setting, a beautiful and challenging course, and is located very near Truckee and North Lake Tahoe. 2024 also marks the 13th Donner Lake Kids Triathlon and the 11th Donner Lake Half Triathlon. We welcome you to Truckee and North Lake Tahoe. Make sure to plan to stay before or after to experience one of the World’s best sporting playgrounds.