100Ms in the USA
Lima, OH
UnitedAF Ultramarathon
Oct 19, 2024
Fairbanks, AK
White Mountains 100
Mar 23, 2024
Easton, WA
Cascade Crest 100 Miler
Jul 19, 2024
Bristol, RI
Anchor Down Ultra
Aug 9, 2024
Honolulu, HI
Hawaii Kai Ultra Run - XTreme
Jul 27, 2024
Hawaii Kai Ultra Run - Kalama Valley
Dec 14, 2024
Jacksonville Beach, FL
Daytona 100 Ultra
Dec 14, 2024
Newport, OR
Tufted Puffin Endurance Run
Aug 3, 2024
San Jose, CA
New Year's One Day
Dec 31, 2024
Tampa, FL
Tampa Bay 100
Nov 2, 2024
Henderson, NV
Jackpot Ultras
Feb 14, 2025
Feb 15, 2025
Ashland, OR
Pine to Palm
Sep 7, 2024
Key West, FL
KEYS100
May 18, 2024
Hot Springs, AR
Run LOViT
Feb 22, 2025
Cuyahoga Falls, OH
Burning River 100 Mile Endurance Run
Jul 27, 2024
Smyrna, GA
Underground Circus 100
May 25, 2024
Corona, CA
Run4Kids 24 Hour Running Party
Mar 22, 2024
Goodyear, AZ
Fat Ox
Nov 22, 2024
Tulsa, OK
Urban Adventure Race
Sep 28, 2024
Vernal, UT
McCoy Flats Death Race
Jul 13, 2024
West Columbia, TX
Grit Ultra Endurance Challenge
Dec 31, 2023
Massillon, OH
Whispering Grace 100
Nov 11, 2023
Pensacola, FL
Wildcat Ultras
Aug 31, 2024
Loudonville, OH
Mohican 100 Mile, 50 Mile and Marathon Runs
Jun 1, 2024
Wendover, UT
Salt Flats Endurance Runs
May 2, 2025
Waynesville, MO
Bad Dawg Ultra
Aug 17, 2024
London, KY
Y'allhalla
Jun 8, 2024
Faust, UT
Pony Express Trail 100
Oct 18, 2024
Kaysville, UT
Wasatch Front 100 Mile Endurance Run
Sep 6, 2024
Burns, TN
Mo' Bell
Oct 12, 2024
Richfield, OH
HIgh Lea 6/12/24
May 18, 2024
Booneville, IA
Booneville Backroads Ultra
Aug 31, 2024
Butte Meadows, CA
Loco Go Big or Go Home Challenge
Jun 1, 2024
Cheney, KS
Honey Badger 100
Jul 27, 2024
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
21. Summer Sizzler Miles Challenge
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Virtual CloseAug 18, 2024Sunday
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100M run
More InformationVirtual for 2024
22. Booneville Backroads Ultra
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Aug 31, 2024Saturday
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100M, 100K, 50K, 10K run | 50K relay
More Information
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Booneville, IA
Dallas County, IA
23. Wildcat Ultras
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Aug 31, 2024Saturday
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100M, 100K, 50K, 15M run
More Information
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Pensacola, FL
Escambia County, FL
24. Wasatch Front 100 Mile Endurance Run
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Sep 6, 2024Friday
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100M run
More Information
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Kaysville, UT
Davis County, UT
25. Pine to Palm
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Sep 7, 2024Saturday
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100M run
More Information
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Ashland, OR
Jackson County, OR
26. Urban Adventure Race
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Sep 28, 2024Saturday
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100M, 75M, 26.2M, 25M run
More Information
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Tulsa, OK
Tulsa County, OK
27. Canal Corridor 100 Mile Endurance Run
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Oct 12, 2024Saturday
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100M run
More Information
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Akron, OH
Summit County, OH
28. Mo' Bell
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Oct 12, 2024Saturday
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24H, 100M, 75M, 12H, 100K, 50M, 50K, 26.2M, 13.1M, 10K, 5K, 1M run | 24H, 12H relay
More Information
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Burns, TN
Dickson County, TN
29. Pony Express Trail 100
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Oct 18, 2024Friday
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100M, 50M run
More Information
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Faust, UT
Tooele County, UT
30. UnitedAF Ultramarathon
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Oct 19, 2024Saturday
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100M, 100K, 50M, 50K run | 100M relay
More Information
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Lima, OH
Allen County, OH
31. Cactus Rose Endurance Trail Race
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Oct 25, 2024Friday
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5M run | 150M, 100M, 50M, 25M trail run | kids run
More Information
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Bandera, TX
Bandera County, TX
32. Cactus Rose Endurance Trail Race
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Oct 26, 2024Saturday
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5M run | 150M, 100M, 50M, 25M trail run | kids run
More Information
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Bandera, TX
Bandera County, TX
33. Cactus Rose Endurance Trail Race
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Oct 27, 2024Sunday
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5M run | 150M, 100M, 50M, 25M trail run | kids run
More Information
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Bandera, TX
Bandera County, TX
34. Tampa Bay 100
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Nov 2, 2024Saturday
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100M run
More Information
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Tampa, FL
Hillsborough County, FL
35. Fat Ox
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Nov 22, 2024Friday
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48H, 24H, 100M, 12H, 100K, 50M, 6H, 50K run
More Information
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Goodyear, AZ
Maricopa County, AZ
36. Daytona 100 Ultra
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Dec 14, 2024Saturday
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100M, 50M, 50K run | 100M relay
More Information
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Jacksonville Beach, FL
Duval County, FL
37. Hawaii Kai Ultra Run - Kalama Valley
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Dec 14, 2024Saturday
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100M, 100K, 50M, 50K, 26.2M, 30K, 13.1M run
More Information
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Honolulu, HI
Honolulu County, HI
38. Across the Years
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Dec 31, 2024Tuesday
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72H, 48H, 24H, 100M, 26.2M run
More Information
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Phoenix, AZ
Maricopa County, AZ
39. New Year's One Day
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Dec 31, 2024Tuesday
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24H, 100M, 12H, 6H run | 24H, 12H, 6H relay
More Information
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San Jose, CA
Santa Clara County, CA
40. Jackpot Ultras
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Feb 14, 2025Friday
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48H, 100M run
More Information
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Henderson, NV
Clark County, NV
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.