Ultra marathons in Colorado, United States
95 races
Vail Ultra Benefiting 50 for the Fallen
Jun 5, 2025 (Thu)
Vail, Colorado, United States
Mace's Hideout 100
Jun 7, 2025 (Sat)
Beulah, Colorado, United States
2.2 - 2.9
$482.75
The Great Divide Ultra
Jun 7-8, 2025 (Sat-Sun)
Divide, Colorado, United States
1.3 - 2.9
$163.25 - $333.65
Broken Brain Backyard
Jun 7, 2025 (Sat)
Craig, Colorado, United States
$136.62
Barr Lake
Jun 14, 2025 (Sat)
Brighton, Colorado, United States
0.9
$179.22
Summits Trail Runs
Jun 14, 2025 (Sat)
Granby, Colorado, United States
1.7
$160
Red, White, and Brew
Jun 21, 2025 (Sat)
Windsor, Colorado, United States
Ring the Springs
Jun 21, 2025 (Sat)
Colorado Springs, Colorado, United States
1.3 - 2.2
$179.22 - $317.67
San Juan Solstice
Jun 21, 2025 (Sat)
Lake City, Colorado, United States
1.8
$269.75
The John Cappis
Jun 28, 2025 (Sat)
Silverton, Colorado, United States
2.2
$0
Silverheels Trail Runs
Jul 11-12, 2025 (Fri-Sat)
Fairplay, Colorado, United States
1.7 - 2.7
$180
Chase the Moon
Jul 11, 2025 (Fri)
Highlands Ranch, Colorado, United States
1.4
$152.6 - $360.27
Hardrock 100 Endurance Run
Jul 11, 2025 (Fri)
Silverton, Colorado, United States
2.7
Silver Rush 50
Jul 12-13, 2025 (Sat-Sun)
Leadville, Colorado, United States
1.6
Ouray 100 Mile Endurance Run
Jul 18, 2025 (Fri)
Ouray, Colorado, United States
2.9
$536
High Lonesome 100
Jul 18, 2025 (Fri)
Chaffee County, Colorado, United States
2.7
Silverton Alpine
Jul 19, 2025 (Sat)
Silverton, Colorado, United States
1.2
$248.45
Powderhorn Mountain Ultra and Vert Challenge
Jul 19, 2025 (Sat)
Mesa, Colorado, United States
$216.5 - $376.25
Power of Four Trail Run
Jul 19, 2025 (Sat)
Aspen, Colorado, United States
1.3
Never Summer 100K & 60K
Jul 25-26, 2025 (Fri-Sat)
Gould, Colorado, United States
1.6 - 2.1
Creede 100
Jul 26, 2025 (Sat)
Creede, Colorado, United States
3
$509.37
Pikes Peak Ultra
Jul 26, 2025 (Sat)
Colorado Springs, Colorado, United States
1.4 - 1.8
$205.85 - $243.12
Grand Mesa Ultras
Jul 26, 2025 (Sat)
Grand Mesa, Colorado, United States
1.4 - 1.8
$141.95 - $163.25
The Summit 200
Jul 28, 2025 (Mon)
Frisco, Colorado, United States
4
Wild West Relay
Aug 1, 2025 (Fri)
Fort Collins, Colorado, United States
Showing 1 - 25 of 95 events