Niwot
Triathlon Calendar near Niwot 2026-2027
Monthly updates for Niwot
Get new running races (and updates) in your inbox every month.
Explore the top triathlons near Niwot for 2026-2027! We've gathered 4 exciting races in the area. Check out our detailed list below to find your next local race.
August 2026
A multi-format triathlon at Boulder Reservoir on August 29, 2026 featuring a sunrise swim, fast bike and smooth run with the Flatirons in view. Sprint, Olympic, aquabike, duathlon and relay options are available.
September 2026
A two-day trail and bike event in Estes Park featuring 31-mile bike and run options, a 15-mile heavy half, and a 62-mile duathlon, with rugged trails, significant climbs, and aid stations supporting competitors.
A multi-format race day at Boyd Lake State Park with triathlon, SUP, duathlon, aquabike, and aquathlon options, onsite camping and spectator-friendly looped courses.
Monthly updates for Niwot
Get new running races (and updates) in your inbox every month.