Nederland
Triathlon Calendar near Nederland 2026-2027
Monthly updates for Nederland
Get new running races (and updates) in your inbox every month.
Explore the top triathlons near Nederland for 2026-2027! We've gathered 8 exciting races in the area. Check out our detailed list below to find your next local race.
February 2027
A winter bike rally and trail run in Lyons, Colorado offering multiple run and ride distances plus an afterparty with food, music and saunas.
June 2027
A mixed gravel-bike and trail-running festival in Lyons, Colorado on June 6, 2027, featuring races from 100K to 5 miles plus relays, BMX, camping and a concert.
IRONMAN 70.3 Boulder on June 12, 2027 features a reservoir swim, hilly bike and run near the Flatirons and Boulder Reservoir with World Championship qualification available.
A multi sport triathlon at Boulder Reservoir featuring a sunrise swim, bike and run with Flatirons views and options from Sprint and Olympic to Aquabike, Duathlon and relays.
July 2027
A single-day multisport event at Boulder Reservoir offering sprint, Olympic, long-course, aquabike, duathlon and relay races, including the BEAST 100.
Monthly updates for Nederland
Get new running races (and updates) in your inbox every month.
August 2027
Family oriented gravel triathlon at Boulder Reservoir with Sprint, Super Sprint, youth races and relay and aquabike options.
A lakeside triathlon at Boulder Reservoir featuring a sunrise swim, fast bike and smooth run with Flatirons views, offered in Sprint, Olympic, duathlon, aquabike and relay formats.
September 2027
Harvest Moon Triathlon at Boulder Reservoir on September 12, 2027 offers a half distance triathlon plus Olympic, sprint, aquabike, duathlon and relay options.