50K ultra marathons in Colorado, United States
46 races
The Great Divide Ultra
Jun 7-8, 2025 (Sat-Sun)
Divide, Colorado, United States
1.3 - 2.9
$163.25 - $333.65
Barr Lake
Jun 14, 2025 (Sat)
Brighton, Colorado, United States
0.9
$179.22
Ring the Springs
Jun 21, 2025 (Sat)
Colorado Springs, Colorado, United States
1.3 - 2.2
$179.22 - $317.67
The John Cappis
Jun 28, 2025 (Sat)
Silverton, Colorado, United States
2.2
$0
Chase the Moon
Jul 11, 2025 (Fri)
Highlands Ranch, Colorado, United States
1.4
$152.6 - $360.27
Silverton Alpine
Jul 19, 2025 (Sat)
Silverton, Colorado, United States
1.2
$248.45
Power of Four Trail Run
Jul 19, 2025 (Sat)
Aspen, Colorado, United States
1.3
Pikes Peak Ultra
Jul 26, 2025 (Sat)
Colorado Springs, Colorado, United States
1.4 - 1.8
$205.85 - $243.12
Aspen Backcountry Marathons
Aug 2, 2025 (Sat)
Aspen, Colorado, United States
$140
Westminster Night Trail
Aug 23, 2025 (Sat)
Westminster, Colorado, United States
1.1
$179.22
Continental Divide Trail Run
Aug 23, 2025 (Sat)
Steamboat Springs, Colorado, United States
1.2
$157.92
Creede Mountain Run
Aug 30, 2025 (Sat)
Creede, Colorado, United States
1.4
$131.3
Devil on the Divide
Sep 6, 2025 (Sat)
Empire, Colorado, United States
1.3
$120.65
Snow Mountain Ranch
Sep 13, 2025 (Sat)
Granby, Colorado, United States
1.3
$163.25
Red Feather Trail Jamboree
Sep 26-28, 2025 (Fri-Sun)
Red Feather Lakes, Colorado, United States
1.3 - 2
$300
WILD Wahatoya Runs
Sep 27, 2025 (Sat)
La Veta, Colorado, United States
$110
Sangre de Cristo Trail Festival
Sep 27-28, 2025 (Sat-Sun)
Westcliffe, Colorado, United States
1.4 - 2.8
West Line Winder
Sep 27, 2025 (Sat)
Buena Vista, Colorado, United States
1.2
Sawatch Ascent
Sep 28, 2025 (Sun)
Chaffee County, Colorado, United States
1.4
Estes Epic
Sep 28, 2025 (Sun)
Estes Park, Colorado, United States
Hanging Flume 50K
Oct 4, 2025 (Sat)
Montrose County, Colorado, United States
1.2
$131.3
Above the Clouds Ultra
Oct 4, 2025 (Sat)
Woodland Park, Colorado, United States
1.3
$152.6
The Bear Chase
Oct 4-5, 2025 (Sat-Sun)
Lakewood, Colorado, United States
1 - 1.9
$157.92 - $211.17
Castle Rock Trail Festival
Oct 4, 2025 (Sat)
Castle Rock, Colorado, United States
1.2
Taco Bell 50K
Oct 4, 2025 (Sat)
Denver, Colorado, United States
Showing 1 - 25 of 46 events