100Ms in the USA
Logan, UT
Bear 100
Sep 26, 2025
Lima, OH
UnitedAF Ultramarathon
Oct 19, 2024
Mount Hood, OR
Hood Hundred
Jul 26, 2025
Perryville, AR
Arkansas Traveller 100
Oct 5, 2024
Glen Rose, TX
Dinosaur Valley Endurance Run
Nov 23, 2024
Nov 24, 2024
Sterling, IL
Hennepin Hundred
Oct 4, 2025
Big Bear Lake, CA
Kodiak Ultra Marathons
Oct 10, 2025
Oct 11, 2025
Fountain Hills, AZ
Javelina Jundred
Oct 26, 2024
Anchorage, AK
Susitna 100 And Little Su 50K
Feb 15, 2025
Alexander City, AL
Lake Martin 100
Apr 5, 2025
Dalton, GA
Georgia Jewel
Sep 20, 2025
Sep 19, 2025
Douglas, MA
Midstate Massive Ultra Trail
Oct 11, 2025
Abingdon, VA
Yeti 100 Mile Endurance Run
Sep 26, 2025
Bend, OR
Oregon Cascades 100
Aug 23, 2025
Bristol, RI
Anchor Down Ultra
Aug 9, 2024
Honolulu, HI
Hawaii Kai Ultra Run - Kalama Valley
Dec 14, 2024
HURT Trail 100
Jan 18, 2025
Hawaii Kai Ultra Run - XTreme
Jul 26, 2025
Jul 27, 2025
Boulder City, NV
Bootleg Boogie Trail Race
Feb 1, 2025
Jacksonville Beach, FL
Daytona 100 Ultra
Dec 14, 2024
Fort Valley, VA
Massanutten Mountain Trails 100 Mile Run
May 17, 2025
Old Dominion 100 Mile Endurance Run
Jun 7, 2025
Dubuque, IA
Mines of Spain 100
Oct 17, 2025
Newport, OR
Tufted Puffin Endurance Run
Aug 3, 2024
Colorado Springs, CO
Ring the Springs
Jun 22, 2024
Jun 23, 2024
East Peoria, IL
Farmdale Trail Run
Oct 12, 2024
Silverton, CO
Hardrock 100
Jul 11, 2025
Granite Bay, CA
Rio Del Lago 100 Mile Endurance Run
Nov 2, 2024
Ardmore, OK
Lake Murray Endurance Run
Oct 26, 2024
San Jose, CA
New Year's One Day
Dec 31, 2024
Raleigh, NC
Umstead 100 Mile Endurance Run
Apr 5, 2025
Lake Tahoe, NV
Tahoe Rim Trail Endurance Runs
Jul 19, 2025
Rocky Point, NY
Tesla Hertz Run
Oct 10, 2025
Oct 11, 2025
Oct 12, 2025
Longview, TX
Grace Creek Grinder
Feb 3, 2024
Tampa, FL
Tampa Bay 100
Nov 8, 2025
Bethel, OH
East Fork 100M/100K
Aug 23, 2025
Richland, WA
Badger Mountain Challenge
Mar 21, 2025
Lawrence, KS
Hawk Hundred
Sep 6, 2025
Syracuse, UT
Antelope Island Buffalo Run
Mar 28, 2025
Henderson, NV
Jackpot Ultras
Feb 14, 2025
Feb 15, 2025
Ottawa, KS
Kansas Rails-to-Trails Extravaganza
Oct 26, 2024
Prairie Spirit Trail Ultra Races
Mar 22, 2025
Petoskey, MI
Wolverine State 100
Oct 11, 2025
Steamboat Springs, CO
Run Rabbit Run
Sep 13, 2025
Sep 12, 2025
Chatsworth, GA
Endurance Hunter 100
Nov 8, 2024
DT 100 Stone Anvil
Apr 16, 2025
Apr 17, 2025
Apr 18, 2025
Apr 19, 2025
Pittsfield, VT
Peak Bloodroot Ultra
May 10, 2024
May 11, 2024
May 8, 2024
Snow Devil Snowshoe Race / Winter Ultra
Jan 25, 2025
Jan 24, 2025
Sylacauga, AL
Pinhoti 100
Nov 2, 2024
Virgil, NY
Virgil Crest Ultras
Sep 14, 2024
Ashland, OR
Pine to Palm
Sep 7, 2024
Heflin, AL
Pinhoti 100
Nov 2, 2024
McCall, ID
IMTUF100
Sep 21, 2024
Key West, FL
KEYS100
May 17, 2025
Decatur, TX
Grasslands Trail Run
Mar 15, 2025
Hot Springs, AR
Run LOViT
Feb 22, 2025
Wildwood, MO
Ozark Foothills
Apr 5, 2025
Apr 6, 2025
Beaver Falls, PA
Rabid Raccoon 100
Mar 15, 2025
Mar 14, 2024
Mar 16, 2025
Pittsburgh, PA
Miles 2 Meals 100 Mile Relay
May 18, 2024
Huntsville, TX
Rocky Raccoon 100 Trail Race
Feb 1, 2025
Cuyahoga Falls, OH
Burning River 100 Mile Endurance Run
Jul 26, 2025
Plain, WA
Plain Endurance Runs
Sep 13, 2025
Pinckney, MI
Run Woodstock
Sep 5, 2025
Sep 6, 2025
Sep 7, 2025
Smyrna, GA
Underground Circus 100
May 24, 2025
Corona, CA
Run4Kids 24 Hour Running Party
Mar 22, 2024
Paso Robles, CA
Silver Moon Race: Paso Robles
Feb 24, 2024
Lakeland, FL
Long Haul 100
Jan 18, 2025
Kings Mountain, NC
Beast of the East 100
Dec 14, 2024
Wrightwood, CA
Angeles Crest 100 Mile Endurance Run
Aug 2, 2025
Rockford, MI
Fred Running Relays
Jul 11, 2025
Jul 12, 2025
Tulsa, OK
Urban Adventure Race
Sep 28, 2024
La Grange, WI
Kettle Moraine 100 Endurance Runs
Jun 14, 2025
Vernal, UT
McCoy Flats Death Race
Jul 13, 2024
Cumberland, RI
Survival of the F.I.T.test 24 Hour Trail Ultra
Oct 19, 2024
Palm Springs, CA
Beyond Limits Ultra
Apr 3, 2024
Albion, IN
Indiana Trail 100
Oct 11, 2025
West Columbia, TX
Grit Ultra Endurance Challenge
Dec 31, 2024
Pinedale, WY
The Drift
Mar 16, 2025
Mar 14, 2025
Pensacola, FL
Wildcat Ultras
Aug 31, 2024
Cassoday, KS
Heartland
Oct 11, 2025
Oct 10, 2025
Triangle, VA
Devil Dog Ultras
Dec 7, 2024
Rocklin, CA
Mile Madness Endurance Run
Oct 10, 2025
Leadville, CO
Leadville Trail 100 Mile Run
Aug 16, 2025
Pocatello, ID
Scout Mountain Ultras
Jun 7, 2025
Jun 6, 2025
Loudonville, OH
Mohican 100 Mile, 50 Mile and Marathon Runs
Jun 1, 2025
Sonoita, AZ
Old Pueblo Endurance Runs
Mar 1, 2025
Titusville, PA
Oil Creek 100 Trail Runs
Oct 12, 2024
Waterville Valley, NH
Jigger Johnson Ultras
Aug 15, 2025
Pelham, AL
Blood Rock 100
Dec 7, 2024
Dec 6, 2024
Fairplay, CO
Silverheels Trail Runs
Jul 11, 2025
Jul 12, 2025
Wilburton, OK
Outlaw 100
Feb 8, 2025
Wendover, UT
Salt Flats Endurance Runs
May 2, 2025
Butte, MT
Copper Kings 100
Jun 27, 2025
Tahlequah, OK
Pumpkin Holler Hunnerd
Oct 19, 2024
Waynesville, MO
Bad Dawg Ultra
Aug 16, 2025
Mesquite, NV
Flat Top Mesa Endurance Run
Feb 28, 2025
Mar 1, 2025
Grandmaster Ultras
Mar 1, 2025
Mar 2, 2025
Steelville, MO
Ozark Trail 100 Mile Endurance Run
Oct 26, 2024
Pine, AZ
Mogollon Monster 100
Sep 6, 2025
Blue Ridge, GA
Endurance Hunter 100
Nov 8, 2024
Cruel Jewel 100
May 16, 2025
Dover, OH
Tuscazoar Endurance Race
Aug 30, 2025
Sturgis, SD
Black Hills 100
Jun 27, 2025
Jun 28, 2025
Faust, UT
Pony Express Trail 100
Oct 17, 2025
Lanesboro, PA
Viaduct Trail Ultramarathon
Jul 13, 2024
Kaysville, UT
Wasatch Front 100 Mile Endurance Run
Sep 5, 2025
Honey Creek, IA
Hitchcock Experience
Dec 7, 2024
Reedley, CA
Silver Moon Race: Kings River
Apr 12, 2025
Needville, TX
Brazos Bend 100
Dec 7, 2024
Wellsboro, PA
Pine Creek Challenge
Sep 7, 2024
Richfield, OH
HIgh Lea 6/12/24
May 17, 2025
Shenandoah, VA
Grindstone
Sep 19, 2025
Sep 20, 2025
North Bonneville, WA
Strawberry Fields Forever
Jun 21, 2025
Buxton, OR
Crown Stub 100
Sep 28, 2024
Ketchum, ID
Standhope Ultra Challenge
Jul 25, 2025
Belleville, WI
Badger Trail Races
Aug 2, 2025
Aug 3, 2025
Ville Platte, LA
Loup Garou Trail Run
Dec 7, 2024
Vienna, IL
Tunnel Hill 100
Nov 9, 2024
Nov 10, 2024
Belmont, MI
Midwest Everest
Sep 27, 2025
Shepherdsville, KY
Crooked Creek Ultra Trail Race
Dec 7, 2024
Dec 8, 2024
Broken Arrow, OK
Bandit Blaze - Some Like It Hot
Aug 1, 2024
Fremont, NE
Crown of the Crest
May 25, 2024
Theilman, MN
Zumbro Endurance Run
Apr 11, 2025
Apr 12, 2025
Smithland, KY
Herzog 100
Apr 20, 2024
Olallie Lake, OR
Mountain Lakes 100
Sep 20, 2025
High Ridge, MO
The Shippey Endurance Runs
Jan 18, 2025
Jan 19, 2025
Westcliffe, CO
Sangre de Cristo Ultras
Sep 27, 2025
Sep 28, 2025
Custer, SD
Lean Horse
Aug 15, 2025
Aug 16, 2025
Sewanee, TN
Rim Runner
Apr 12, 2025
Canal Fulton, OH
Eagle Up Ultra
Jun 7, 2025
Sylvan Grove, KS
Hell Creek 100
Oct 4, 2025
Jamestown, TN
No Business 100
Oct 25, 2024
Olympic Valley, CA
Western States Endurance Run
Jun 28, 2025
Foresthill, CA
Canyons Endurance Runs
Apr 25, 2025
Apr 26, 2025
Norton, VA
Cloudsplitter 100
Oct 12, 2024
Cat Spring, TX
Habanero Hundred
Aug 23, 2025
Booneville, IA
Booneville Backroads Ultra
Aug 31, 2024
Butte Meadows, CA
Loco Go Big or Go Home Challenge
Jun 1, 2024
Hewitt, NJ
Wild Goose
Sep 20, 2025
Olga, WA
Orcas Island 100
Feb 21, 2025
Oak Hill, WV
Rim to River 100
Oct 25, 2025
Port Gamble, WA
Lumberjack Endurance Runs
Jun 8, 2024
Logandale, NV
Fire Fest Ultra
Nov 23, 2024
Nov 24, 2024
Nov 22, 2024
Julian, CA
San Diego 100
Jun 6, 2025
Divide, CO
Great Divide Ultra
Jun 7, 2025
Jun 8, 2025
Keithville, LA
Screaming Monkey 100
Nov 2, 2024
Flovilla, GA
Bootlegger
Apr 5, 2025
Waterville, PA
Eastern States 100
Aug 9, 2025
Blacksburg, SC
Mountaineer Rumble
Nov 2, 2024
Teanaway, WA
Teanaway Country 100
Sep 21, 2024
Granger, IA
Stuffed Turkey Endurance Races
Nov 23, 2024
Chesterfield, MA
Chesterfield Gorge Ultra and 25K Race
May 31, 2025
Jun 1, 2025
Apple Valley, UT
Zion Ultras
Apr 12, 2025
Apr 11, 2025
Cuba, NM
Deadman Peaks Trail Run
Nov 2, 2024
Cheney, KS
Honey Badger 100
Jul 12, 2025
Hainesport, NJ
Hainesport Endurance Run
Oct 12, 2024
La Sal, UT
UTE 100
Aug 2, 2025
Orderville, UT
Zion 100-Mile Challenge
Aug 28, 2024
Davis, OK
Arbuckle 100
Feb 22, 2025
Chehalis, WA
Willapa Trail Festival
Nov 9, 2024
Mount Princeton, CO
High Lonesome 100
Jul 18, 2025
Silver Hill Meadow, VT
Vermont 100 Endurance Race
Jul 18, 2025
Christmas, FL
Forgotten Florida
Feb 1, 2025
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City Location
Featured Listing
1. Rabid Raccoon 100
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Past DateMar 14, 2024ThursdayMar 15, 2025Saturday1 more
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100M, 100K, 13.1M, 5K trail run | 100M relay | 5K obstacle run
More Information
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Beaver Falls, PA
Beaver County, PA
181. Hell Creek 100
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Oct 4, 2025Saturday
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140M, 100M, 100K, 20M trail run
More Information
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Sylvan Grove, KS
Lincoln County, KS
182. Hennepin Hundred
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Oct 4, 2025Saturday
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100M, 50M, 50K trail run
More Information
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Sterling, IL
Whiteside County, IL
183. Kodiak Ultra Marathons
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Oct 10, 2025Friday
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100M trail run
More Information
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Big Bear Lake, CA
San Bernardino County, CA
184. Mile Madness Endurance Run
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Oct 10, 2025Friday
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72H, 48H, 24H, 100M, 12H, 6H trail run | kids run
More Information
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Rocklin, CA
Placer County, CA
185. Heartland
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Oct 11, 2025Saturday
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100M, 100K, 50M, 26.2M, 13.1M trail run
More Information
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Cassoday, KS
Butler County, KS
186. Indiana Trail 100
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Oct 11, 2025Saturday
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100M, 100K, 50M trail run
More Information
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Albion, IN
Noble County, IN
187. Midstate Massive Ultra Trail
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Oct 11, 2025Saturday
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100M, 50M, 30M trail run
More Information
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Douglas, MA
Worcester County, MA
188. Tesla Hertz Run
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Oct 11, 2025Saturday
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100M, 100K, 50M, 50K trail run
More Information
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Rocky Point, NY
Suffolk County, NY
189. Wolverine State 100
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Oct 11, 2025Saturday
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100M, 100K, 50K run
More Information
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Petoskey, MI
Emmet County, MI
190. Mines of Spain 100
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Oct 17, 2025Friday
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100M, 100K trail run
More Information
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Dubuque, IA
Dubuque County, IA
191. Pony Express Trail 100
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Oct 17, 2025Friday
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100M, 50M run
More Information
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Faust, UT
Tooele County, UT
192. Cactus Rose Endurance Trail Race
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Oct 24, 2025Friday
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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
193. Cactus Rose Endurance Trail Race
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Oct 25, 2025Saturday
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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
194. Rim to River 100
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Oct 25, 2025Saturday
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100M trail run
More Information
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Oak Hill, WV
Fayette County, WV
195. Cactus Rose Endurance Trail Race
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Oct 26, 2025Sunday
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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
196. Tampa Bay 100
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Nov 8, 2025Saturday
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100M run
More Information
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Tampa, FL
Hillsborough County, FL
197. tBunk Endurance Challenge
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Nov 8, 2025Saturday
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100M, 50M, 15K trail run
More Information
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Whitewater, WI
Walworth County, WI
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.