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Ultra Marathons Near Colorado
Showing the next 50 runs that match your filters
Featured
Durango Marathon
Destination Race!
Date: Oct 11, 2026 - Sunday
Size: 500 - 1,000 participants
Location: Durango, Colorado
Featured
Samson's Revenge Trail Race
Mostly fast single track course!
Date: May 23, 2026 - Saturday
Size: 100 - 500 participants
Location: Estes Park, Colorado
Samson's Revenge Trail Race
Date: May 23, 2026 - Saturday
Size: 100 - 500 participants
Location: Estes Park, Colorado
Colorado Springs Spartan Weekend
Date: May 30-31, 2026 - Saturday to Sunday
Size: 500 - 1,000 participants
Location: Colorado Springs, Colorado
North Fork Trail Race
Date: May 30, 2026 - Saturday
Size: 100 - 500 participants
Location: Pine, Colorado
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Weld Your Mettle Running Festival
Date: May 30-31, 2026 - Saturday to Sunday
Size: 100 - 500 participants
Location: Eaton, Colorado
Ragnar Trail Colorado
Date: Jun 5-6, 2026 - Friday to Saturday
Size: 1,000 - 5,000 participants
Location: Snowmass Village, Colorado
Great Divide Ultra
Date: Jun 6-7, 2026 - Saturday to Sunday
Size: 100 - 500 participants
Location: Teller County, Colorado
Marsh Peak Madness: Endurance & Speed Event
Get 10% Off - Use Code Mad Mash 10
Date: Jun 6, 2026 - Saturday
Size: 100 - 500 participants
Location: Maeser, Utah
Sinks Canyon Rough and Tumble Trail Runs
Date: Jun 13, 2026 - Saturday
Size: 100 - 500 participants
Location: Lander, Wyoming
Barr Lake Trail Race
Date: Jun 13, 2026 - Saturday
Size: 100 - 500 participants
Location: Commerce City, Colorado
Ring the Springs
Date: Jun 20, 2026 - Saturday
Size: 100 - 500 participants
Location: Colorado Springs, Colorado
Bears Ears Ultra
Date: Jun 20, 2026 - Saturday
Size: 100 - 500 participants
Location: San Juan County, Utah
Black Hills 100
Date: Jun 26-27, 2026 - Friday to Saturday
Size: 100 - 500 participants
Location: Sturgis, South Dakota
Chase the Moon 12 Hour Endurance Run
Date: Jun 27, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Highlands Ranch, Colorado
Estes Park's Backyard Ultra Race
Date: Jun 27, 2026 - Saturday
Size: 1 - 100 participants
Location: Estes Park, Colorado
Hardrock 100 Endurance Run
Date: Jul 10, 2026 - Friday
Size: 100 - 500 participants
Location: Silverton, Colorado
The Silverheels Trail Runs
Date: Jul 10-11, 2026 - Friday to Saturday
Size: 100 - 500 participants
Location: Como, Colorado
Silver Rush 50
Date: Jul 11, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Leadville, Colorado
Ouray 100 and 50 Mile Endurance Run
Date: Jul 17-19, 2026 - Friday to Sunday
Size: 1 - 100 participants
Location: Ouray, Colorado
High Lonesome 100
Date: Jul 17-18, 2026 - Friday to Saturday
Size: 1 - 100 participants
Location: Salida, Colorado
Skunk Hollow Sneaker Chase
Date: Jul 18, 2026 - Saturday
Size: 100 - 500 participants
Location: Casper, Wyoming
Never Summer 100K & 60K
Date: Jul 24-26, 2026 - Friday to Sunday
Size: 100 - 500 participants
Location: Walden, Colorado
Pikes Peak Ultra
Date: Jul 25, 2026 - Saturday
Size: 100 - 500 participants
Location: Colorado Springs, Colorado
Lean Horse
Date: Jul 31-Aug 1, 2026 - Friday to Saturday
Size: 100 - 500 participants
Location: Custer, South Dakota
Sheep Mountain Ultras
Date: Aug 1, 2026 - Saturday
Size: 100 - 500 participants
Location: Fairplay, Colorado
Aspen Backcountry
Date: Aug 1, 2026 - Saturday
Size: 100 - 500 participants
Location: Aspen, Colorado
Cloudcroft Ultra
Date: Aug 15, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Cloudcroft, New Mexico
Telluride Mountain Run
Date: Aug 21-22, 2026 - Friday to Saturday
Size: 1 - 100 participants
Location: Telluride, Colorado
Leadville Trail 100 Run
Date: Aug 22, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Leadville, Colorado
Continental Divide Trail Run
Date: Aug 23, 2026 - Sunday
Size: 100 - 500 participants
Location: Steamboat Springs, Colorado
Rock Hawk Trail Races
Date: Aug 29, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Castle Rock, Colorado
Devil on the Divide
Date: Sep 12, 2026 - Saturday
Size: 100 - 500 participants
Location: Idaho Springs, Colorado
Snow Mountain Ranch Trail Running Festival
Date: Sep 12, 2026 - Saturday
Size: 100 - 500 participants
Location: Grand Lake, Colorado
Jelm Mountain Run
Date: Sep, 2026 (TBD)
Size: 1 - 100 participants
Location: Albany County, Wyoming
Run Rabbit Run
Date: Sep 18-19, 2026 - Friday to Saturday
Size: 100 - 500 participants
Location: Steamboat Springs, Colorado
Red Feather Trail Jamboree
Date: Sep 25-27, 2026 - Friday to Sunday
Size: 100 - 500 participants
Location: Goodell Corner, Colorado
Crested Butte Ultra
Date: Sep 26, 2026 - Saturday
Size: 100 - 500 participants
Location: Crested Butte, Colorado
24 Hours of Palmer Lake
Date: Sep 26, 2026 - Saturday
Size: 100 - 500 participants
Location: Palmer Lake, Colorado
Sangre de Cristo Ultras
Date: Sep 26-27, 2026 - Saturday to Sunday
Size: 100 - 500 participants
Location: Westcliffe, Colorado
Wild Wahatoya Runs
Get 10% Off - Use Code RUNGUIDE10
Date: Sep 26, 2026 - Saturday
Size: 100 - 500 participants
Location: La Veta, Colorado
Estes Epic Ultra Run & MTB Race
Date: Sep 26-27, 2026 - Saturday to Sunday
Size: 1 - 100 participants
Location: Estes Park, Colorado
Race The Ranch Snowshoe Ultra
Date: Sep 27, 2026 - Sunday
Size: 1 - 100 participants
Location: Granby, Colorado
Mainly Marathons Center of the Nation Series - Day 1
Date: Sep 28, 2026 - Monday
Size: 1 - 100 participants
Location: Cheyenne, Wyoming
Mainly Marathons Center of the Nation Series - Day 2
Date: Sep 29, 2026 - Tuesday
Size: 1 - 100 participants
Location: Sterling, Colorado
Mainly Marathons Center of the Nation Series - Day 3
Date: Sep 30, 2026 - Wednesday
Size: 1 - 100 participants
Location: Chadron, Nebraska
Mainly Marathons Center of the Nation Series - Day 4
Date: Oct 1, 2026 - Thursday
Size: 1 - 100 participants
Location: Belle Fourche, South Dakota
Arches Marathon and Half
Date: Oct 3, 2026 - Saturday
Size: 100 - 500 participants
Location: Moab, Utah
Sage Burner Trail Races
Date: Oct 3, 2026 - Saturday
Size: 100 - 500 participants
Location: Gunnison, Colorado
The Bear Chase Trail Races
Date: Oct 3-4, 2026 - Saturday to Sunday
Size: 100 - 500 participants
Location: Lakewood, Colorado
Moab 240 Endurance Run
Date: Oct 9-14, 2026 - Friday to Wednesday
Size: 100 - 500 participants
Location: Moab, Utah
Rocky's Backyard Ultra Race
Date: Oct 10, 2026 - Saturday
Size: 1 - 100 participants
Location: Estes Park, Colorado
