100Ms in the USA on Saturdays
Indianapolis, IN
Indy Piston Endurance Run
Jun 3, 2023
Lima, OH
UnitedAF Ultramarathon
Oct 19, 2024
Mount Hood, OR
Hood Hundred
Aug 3, 2024
Perryville, AR
Arkansas Traveller 100
Oct 5, 2024
Glen Rose, TX
Dinosaur Valley Endurance Run
Nov 23, 2024
Nov 24, 2024
Fairbanks, AK
White Mountains 100
Mar 23, 2024
Sterling, IL
Hennepin Hundred
Oct 5, 2024
Fountain Hills, AZ
Javelina Jundred
Oct 26, 2024
Midway, UT
Valkyrie Multisport Relay
Sep 14, 2024
Anchorage, AK
Susitna 100 And Little Su 50K
Feb 17, 2024
Alexander City, AL
Lake Martin 100
Mar 16, 2024
Easton, WA
Ultra Fest
Sep 21, 2024
Douglas, MA
Midstate Massive Ultra Trail
Oct 12, 2024
Bend, OR
Oregon Cascades 100
Aug 24, 2024
Honolulu, HI
Hawaii Kai Ultra Run - XTreme
Jul 27, 2024
Hawaii Kai Ultra Run - Kalama Valley
Dec 14, 2024
HURT Trail 100
Jan 18, 2025
Jacksonville Beach, FL
Daytona 100 Ultra
Dec 14, 2024
Fort Valley, VA
Massanutten Mountain Trails 100 Mile Run
May 18, 2024
Old Dominion 100 Mile Endurance Run
Jun 1, 2024
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
Granite Bay, CA
Rio Del Lago 100 Mile Endurance Run
Nov 2, 2024
Ardmore, OK
Lake Murray Endurance Run
Oct 26, 2024
Raleigh, NC
Umstead 100 Mile Endurance Run
Apr 6, 2024
Lake Tahoe, NV
Tahoe Rim Trail Endurance Runs
Jul 20, 2024
Rocky Point, NY
Tesla Hertz Run
Oct 12, 2024
Longview, TX
Grace Creek Grinder
Feb 3, 2024
Tampa, FL
Tampa Bay 100
Nov 2, 2024
Bethel, OH
East Fork 100M/100K
Aug 24, 2024
Stowe, VT
100 on100 Relay
Aug 10, 2024
Lawrence, KS
Hawk Hundred
Sep 7, 2024
Henderson, NV
Jackpot Ultras
Feb 14, 2025
Feb 15, 2025
Ottawa, KS
Prairie Spirit Trail Ultra Races
Mar 23, 2024
Kansas Rails-to-Trails Extravaganza
Oct 26, 2024
Moab, UT
Canyonlands Ultra
Oct 26, 2024
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 18, 2024
Decatur, TX
Grasslands Trail Run
Mar 16, 2024
Wildwood, MO
Ozark Foothills
Apr 6, 2024
Apr 7, 2024
Beaver Falls, PA
Rabid Raccoon 100
Mar 16, 2024
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 27, 2024
Plain, WA
Plain Endurance Runs
Sep 14, 2024
Smyrna, GA
Underground Circus 100
May 25, 2024
Goodyear, AZ
Coldwater Rumble Trail Runs
Jan 20, 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 3, 2024
Tulsa, OK
Urban Adventure Race
Sep 28, 2024
La Grange, WI
Kettle Moraine 100 Endurance Runs
Jun 8, 2024
Cumberland, RI
Survival of the F.I.T.test 24 Hour Trail Ultra
Oct 21, 2023
Albion, IN
Indiana Trail 100
Oct 12, 2024
San Antonio, TX
Medusa 100
Nov 4, 2023
Massillon, OH
Whispering Grace 100
Nov 11, 2023
Pensacola, FL
Wildcat Ultras
Aug 31, 2024
Cassoday, KS
Heartland
Oct 12, 2024
Oct 11, 2024
Triangle, VA
Devil Dog Ultras
Dec 2, 2023
Rocklin, CA
Ride To Walk Endurance Race
Sep 23, 2023
Jackson, GA
Bootlegger
Apr 6, 2024
Leadville, CO
Leadville Trail 100 Mile Run
Aug 17, 2024
Loudonville, OH
Mohican 100 Mile, 50 Mile and Marathon Runs
Jun 1, 2024
Sonoita, AZ
Old Pueblo Endurance Runs
Mar 2, 2024
Titusville, PA
Oil Creek 100 Trail Runs
Oct 12, 2024
Wilburton, OK
Outlaw 100
Feb 8, 2025
Tahlequah, OK
Pumpkin Holler Hunnerd
Oct 19, 2024
Waynesville, MO
Bad Dawg Ultra
Aug 17, 2024
Steelville, MO
Ozark Trail 100 Mile Endurance Run
Oct 26, 2024
Pine, AZ
Mogollon Monster 100
Sep 7, 2024
Dover, OH
Tuscazoar Endurance Race
Aug 31, 2024
London, KY
Y'allhalla
Jun 8, 2024
Lanesboro, PA
Viaduct Trail Ultramarathon
Jul 13, 2024
Honey Creek, IA
Hitchcock Experience
Dec 7, 2024
Ludlow, VT
100 on100 Relay
Aug 10, 2024
Reedley, CA
Silver Moon Race: Reedley
Apr 20, 2024
Burns, TN
Mo' Bell
Oct 12, 2024
Burnet, TX
Full Moon Ultra
Oct 28, 2023
Needville, TX
Brazos Bend 100
Dec 7, 2024
Wellsboro, PA
Pine Creek Challenge
Sep 7, 2024
Richfield, OH
HIgh Lea 6/12/24
May 18, 2024
North Bonneville, WA
Strawberry Fields Forever
Jun 22, 2024
Bolivar, OH
5 Lakes Ultra Race
Aug 5, 2023
Belleville, WI
Badger Trail Races
Aug 3, 2024
Aug 4, 2024
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 28, 2024
Shepherdsville, KY
Crooked Creek Ultra Trail Race
Dec 7, 2024
Dec 8, 2024
Fremont, NE
Crown of the Crest
May 25, 2024
Smithland, KY
Herzog 100
Apr 20, 2024
Olallie Lake, OR
Mountain Lakes 100
Sep 21, 2024
High Ridge, MO
The Shippey Endurance Runs
Jan 18, 2025
Jan 19, 2025
Sewanee, TN
Rim Runner
Apr 13, 2024
Apr 14, 2024
Canal Fulton, OH
Eagle Up Ultra
Jun 1, 2024
Sylvan Grove, KS
Hell Creek 100
Sep 28, 2024
Olympic Valley, CA
Western States Endurance Run
Jun 29, 2024
Norton, VA
Cloudsplitter 100
Oct 12, 2024
Cat Spring, TX
Habanero Hundred
Aug 24, 2024
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 21, 2024
Oak Hill, WV
Rim to River 100
Oct 26, 2024
Port Gamble, WA
Lumberjack Endurance Runs
Jun 8, 2024
Logandale, NV
Fire Fest Ultra
Nov 23, 2024
Nov 24, 2024
Nov 22, 2024
Divide, CO
Great Divide Ultra
Jun 1, 2024
Jun 2, 2024
Keithville, LA
Screaming Monkey 100
Nov 2, 2024
Waterville, PA
Eastern States 100
Aug 10, 2024
Blacksburg, SC
Mountaineer Rumble
Nov 2, 2024
Hatch, UT
Bryce Canyon Ultras
May 18, 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
Jun 1, 2024
Jun 2, 2024
Apple Valley, UT
Zion Ultras
Apr 13, 2024
Apr 14, 2024
Cuba, NM
Deadman Peaks Trail Run
Nov 2, 2024
Cheney, KS
Honey Badger 100
Jul 27, 2024
La Sal, UT
UTE 100
Aug 24, 2024
Davis, OK
Arbuckle 100
Apr 6, 2024
Christmas, FL
Forgotten Florida
Feb 1, 2025
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. Indy Piston Endurance Run
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Past DateJun 3, 2023Saturday
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100M, 100K, 50M, 50K, 13.1M run
Virtual OptionMore Information
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Indianapolis, IN
Marion County, IN
2. 5 Lakes Ultra Race
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Past DateAug 5, 2023Saturday
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200M, 100M, 100K, 50K trail run
More Information
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Bolivar, OH
Tuscarawas County, OH
3. Ride To Walk Endurance Race
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Past DateSep 23, 2023Saturday
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48H, 24H, 100M, 12H, 6H trail run
More Information
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Rocklin, CA
Placer County, CA
4. Survival of the F.I.T.test 24 Hour Trail Ultra
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Past DateOct 21, 2023Saturday
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24H, 100M, 100K, 50K trail run | 24H relay
More Information
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Cumberland, RI
Providence County, RI
5. Full Moon Ultra
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Past DateOct 28, 2023Saturday
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100M, 50M, 20K, 10K trail run
More Information
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Burnet, TX
Burnet County, TX
6. Medusa 100
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Past DateNov 4, 2023Saturday
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100M, 100K, 50K, 10K, 5K trail run
More Information
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San Antonio, TX
Bexar County, TX
7. Whispering Grace 100
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Past DateNov 11, 2023Saturday
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100M, 100K, 50K run
More Information
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Massillon, OH
Stark County, OH
8. Devil Dog Ultras
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Past DateDec 2, 2023Saturday
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100M, 100K, 50K trail run
More Information
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Triangle, VA
Prince William County, VA
9. Coldwater Rumble Trail Runs
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Past DateJan 20, 2024Saturday
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100M, 52M, 52K, 50K, 20M, 20K, 4M trail run
More Information
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Goodyear, AZ
Maricopa County, AZ
10. Grace Creek Grinder
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Past DateFeb 3, 2024Saturday
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100M, 100K, 2.5M trail run
More Information
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Longview, TX
Gregg County, TX
11. Snow Devil Snowshoe Race / Winter Ultra
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Past DateFeb 10, 2024Saturday
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100M, 100K trail run
More Information
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Pittsfield, VT
Rutland County, VT
12. Red Dirt Ultra
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Past DateFeb 17, 2024Saturday
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100M, 100K, 50K trail run
More Information
- Provencal, LA
13. Susitna 100 And Little Su 50K
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Past DateFeb 17, 2024Saturday
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100M, 50K trail run
More Information
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Anchorage, AK
Anchorage County, AK
14. Silver Moon Race: Paso Robles - Paso Robles
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Past DateFeb 24, 2024Saturday
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24H, 100M, 12H, 6H, 10K, 2M trail run | 24H, 100M, 12H, 6H relay
More Information
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Paso Robles, CA
San Luis Obispo County, CA
15. Old Pueblo Endurance Runs
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Past DateMar 2, 2024Saturday
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100M, 75M, 50M, 25M trail run
More Information
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Sonoita, AZ
Santa Cruz County, AZ
16. Mountains to Sea Trail 100 Endurance Run
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Past DateMar 9, 2024Saturday
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100M, 50M, 50K trail run
More Information
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Durham, NC
Durham County, NC
17. Pistol Ultra Run
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Past DateMar 9, 2024Saturday
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100M, 100K, 50M, 50K run
More Information
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Alcoa, TN
Blount County, TN
18. Grasslands Trail Run
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Past DateMar 16, 2024Saturday
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100M, 50M, 26.2M, 13.1M, 15K trail run
More Information
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Decatur, TX
Wise County, TX
19. Lake Martin 100
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Past DateMar 16, 2024Saturday
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100M, 50M, 27M trail run
More Information
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Alexander City, AL
Tallapoosa County, AL
20. Rabid Raccoon 100
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Past DateMar 16, 2024Saturday
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100M, 100K, 13.1M trail run
More Information
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Beaver Falls, PA
Beaver County, PA
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.