Endurance Races in Colorado, United States 2026 63 events
Browse upcoming endurance races in United States. Find dates, distances, and registration links.
Upcoming races
RunningIn 2 months
Old School Ultras
◎ Denver, USA▤ Dec 31, 2026
RunningIn 2 months
Sky Pilots Club Membership
◎ Ouray, USA▤ Dec 31, 2026
RunningIn 3 months
All-Out Polar Prowl
◎ Arvada, USA▤ Jan 9, 2027
TriathlonIn 3 months
ALMAGEDDON Winter Triathlon presented by the Alma Foundation
◎ Alma, USA▤ Jan 16, 2027
RunningIn 3 months
MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA
◎ Aurora, USA▤ Jan 16, 2027
5 km
RunningIn 3 months
Coffee Lover Run DENVER/AURORA
◎ Aurora, USA▤ Jan 30, 2027
RunningIn 4 months
All-Out Mardi Crawl
◎ Arvada, USA▤ Feb 6, 2027
RunningIn 4 months
Valentine's Day Run 5K/10K/13.1 DENVER/AURORA
◎ Aurora, USA▤ Feb 13, 2027
5 km
RunningIn 5 months
22nd Annual Run Through Time Trail Marathon and Half Marathon
◎ Salida, USA▤ Mar 13, 2027
42.2 km
RunningIn 5 months
All-Out Spring Fever
◎ Golden, USA▤ Mar 21, 2027
RunningIn 5 months
Central Park 5k
◎ Denver, USA▤ Mar 28, 2027
5 km
RunningIn 6 months
Donut Dash
◎ Denver, USA▤ Apr 4, 2027
RunningIn 6 months
Rattler Trail Race
◎ Colorado Springs, USA▤ Apr 17, 2027
RunningIn 6 months
Cheyenne Mountain Trail Race
◎ Colorado Springs, USA▤ Apr 24, 2027
RunningIn 6 months
All-Out Beat the Heat
◎ Westminster, USA▤ Apr 24, 2027
5 km
RunningIn 6 months
Take 5 in the Garden
◎ Colorado Springs, USA▤ May 1, 2027
RunningIn 6 months
The Pilgrimage
◎ Mack, USA▤ May 2, 2027
RunningIn 7 months
Valkyrie Trail Race
◎ Colorado Springs, USA▤ May 8, 2027
RunningIn 7 months
Colterris Wine Run 5k
◎ Palisade, USA▤ May 8, 2027
5 km
RunningIn 7 months
Colorado Women's Classic - Westminster
◎ Westminster, USA▤ May 9, 2027