Get ready for an exciting day of athleticism and community spirit at the Lake Montclair Triathlon & Duathlon on Sunday, June 15, 2025! Set against the stunning backdrop of Dolphin Beach in Dumfries, Prince William, this cherished event is one of Northern Virginia's oldest triathlons, attracting participants from near and far.

Though this year's race will feature an important update with the swim leg canceled, athletes can still participate in thrilling options including the Sprint Triathlon, Duathlon, or Aquabike. Race distances include a 12.5-mile bike segment and a 3.1-mile run for both the triathlon and duathlon. The Duathlon will kick off with a 1.5-mile run before the bike leg. Whether you’re a seasoned competitor or a first-timer, the Lake Montclair Triathlon & Duathlon promises an exhilarating experience filled with camaraderie and the beauty of nature. Don't miss out on this fantastic opportunity to challenge yourself and enjoy a memorable day!