August Ultras within 400 miles of Riverton, UT
Crested Butte, CO
Grand Traverse Mountain Run
Aug 31, 2024
Steamboat Springs, CO
Continental Divide Trail Run
Aug 24, 2024
Wild West Relay
Aug 1, 2025
Springville, UT
Kat'cina Mosa 100K Mountain Run
Aug 3, 2024
Buena Vista, CO
TransRockies Run
Aug 4, 2025
Castle Rock, CO
Rock Hawk Trail Races
Aug 25, 2024
Bountiful, UT
Elephant Rock Trail Run
Aug 24, 2024
Vernal, UT
Mountain Madness
Aug 10, 2024
West Yellowstone, MT
Yellowstone Trail Race
Aug 3, 2024
Aug 4, 2024
Leadville, CO
Leadville Trail 100 Mile Run
Aug 16, 2025
Fairplay, CO
Sheep Mountain Trail Runs
Aug 2, 2025
Wendover, UT
Dusk to Dawn Relay + Ultra
Aug 29, 2025
Creede, CO
Creede Mountain Run
Aug 30, 2025
Island Park, ID
Harriman Park 25K/50K
Aug 17, 2024
Fort Collins, CO
Wild West Relay
Aug 1, 2025
Irwin, ID
Operation CENTURY
Aug 30, 2024
La Sal, UT
UTE 100
Aug 24, 2024
Orderville, UT
Zion 100-Mile Challenge
Aug 28, 2024
Cooke City, MT
Prospector's 50K
Aug 10, 2024
Aug 11, 2024
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. Wild West Relay
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Aug 1, 2025Friday
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200M relay
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startFort Collins, CO363 miles point to pointfinishSteamboat Springs, CO271 miles point to pointRoutt County, COLarimer County, CO
2. Sheep Mountain Trail Runs
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Aug 2, 2025Saturday
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50M, 50K, 13.1M trail run
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Fairplay, CO
327 miles point to pointPark County, CO
3. Kat'cina Mosa 100K Mountain Run
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Past DateAug 3, 2024Saturday
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100K trail run
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Springville, UT
30 miles point to pointUtah County, UT
4. Yellowstone Trail Race
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Past DateAug 3, 2024Saturday
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50K, 25K, 10K run | trail run
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West Yellowstone, MT
289 miles point to pointGallatin County, MT
5. TransRockies Run
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Aug 4, 2025Monday
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120M trail run
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Buena Vista, CO
329 miles point to pointChaffee County, CO
6. Yellowstone Trail Race
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Past DateAug 4, 2024Sunday
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50K, 25K, 10K run | trail run
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West Yellowstone, MT
289 miles point to pointGallatin County, MT
7. Mountain Madness
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Past DateAug 10, 2024Saturday
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50M run | 50M relay
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Vernal, UT
128 miles point to pointUintah County, UT
8. Prospector's 50K
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Past DateAug 10, 2024Saturday
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50K trail run
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Cooke City, MT
328 miles point to pointPark County, MT
9. Skyline Mountain Marathon
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Past DateAug 10, 2024Saturday
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55K, 26.2M, 30K, 13.1M trail run
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Eden, UT
54 miles point to pointWeber County, UT
10. The Divide Trail Race
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Past DateAug 10, 2024Saturday
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50K, 25K trail run
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Butte, MT
380 miles point to pointSilver Bow County, MT
11. The Divide Trail Race
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Past DateAug 11, 2024Sunday
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50K, 25K trail run
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Butte, MT
380 miles point to pointSilver Bow County, MT
12. Leadville Trail 100 Mile Run
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Aug 16, 2025Saturday
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100M trail run
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Leadville, CO
312 miles point to pointLake County, CO
13. Harriman Park 25K/50K
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Past DateAug 17, 2024Saturday
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50K, 25K trail run
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Island Park, ID
271 miles point to pointFremont County, ID
14. Triple Trail Challenge
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Past DateAug 17, 2024SaturdayMid Mountain 50K
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50K trail run
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Park City, UT
25 miles point to pointSummit County, UT
15. Continental Divide Trail Run
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Past DateAug 24, 2024Saturday
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50K, 16M trail run
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Steamboat Springs, CO
271 miles point to pointRoutt County, CO
16. Elephant Rock Trail Run
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Past DateAug 24, 2024Saturday
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50K, 26.8M, 13.8M, 7M trail run
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Bountiful, UT
25 miles point to pointDavis County, UT
17. UTE 100
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Past DateAug 24, 2024Saturday
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100M, 50M trail run
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La Sal, UT
209 miles point to pointSan Juan County, UT
18. Rock Hawk Trail Races
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Past DateAug 25, 2024Sunday
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50K, 25K, 10K, 5K trail run
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Castle Rock, CO
383 miles point to pointDouglas County, CO
19. Zion 100-Mile Challenge
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Past DateAug 28, 2024Wednesday
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100M trail run
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Orderville, UT
227 miles point to pointKane County, UT
20. Dusk to Dawn Relay + Ultra
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Aug 29, 2025Friday
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11H run | 11H relay
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Wendover, UT
112 miles point to pointTooele County, UT
For the love of all that Is good And moisture wicking...
Though we Try To be accurate And On top Of things... Race details can change When we aren't lookin. And once in a while we simply make a mistake.
ALWAYS visit the race's website for the most complete and accurate race information.
ALWAYS visit the race's website for the most complete and accurate race information.