Reston Duathlon

Attention Athletes: Reston Triathlon Transitions to Duathlon Format

Updated August 29, 2024
For the safety of our athletes, we need to convert this years Reston Triathlon to a duathlon format. Due to cyanobacteria (also known as blue-green algae) in Lake Audubon, the lake designated for the swim course, we cannot facilitate the original race. While this change wasnt anticipated, were fully committed to turning this challenge into an opportunity. Our team is working tirelessly to create an exceptional duathlon experience that prioritizes everyones health and safety while offering an exciting, competitive event. This adapted format will showcase the resilience and adaptability of our athletic community. Were excited to see you push your limits in this new challenge!



Since 1984, the Reston Triathlon has been a staple in our community. It opens with a 1500-meter open water swim in Lake Audubon, followed by a 25-mile bike ride and a 10K run on local paths. The Olympic distance event has challenged athletes from around the country and has affectionately been called the Reston Triathlon World Championship.

During the pandemic, the previous board worked tirelessly to keep the tradition alive. Unfortunately, in 2021, they announced they could no longer financially or logically sustain the Reston Triathlon. CORE Foundation, working closely with the previous board, is thrilled to revive the event and continue the legacy. The Reston Triathlon made its comeback debut on September 10, 2023, and is held annually on the Sunday after Labor Day.

CORE Foundation is grateful for the loyal athletes and local community. They received overwhelming support while pursuing the opportunity to restore this community event.

To join our list of wonderful partners, please email [email protected].