100Ks in the USA
Indianapolis, IN
Indy Piston Endurance Run
Jun 5, 2021
Nashville, IN
Dances With Dirt - Gnaw Bone, IN
May 22, 2021
Mt. Hood, OR
Wy'east Howl Trail Run
Jul 31, 2021
Glen Rose, TX
Dinosaur Valley Endurance Run
Nov 20, 2021
Nov 21, 2021
Florahome, FL
Iron Horse Endurance Runs
Feb 8, 2020
Fountain Hills, AZ
Javelina Jundred
Oct 30, 2021
Deerfield Beach, FL
PALM100 Ultras
Oct 26, 2019
Fayetteville, NY
Green Lakes Endurance Runs
Aug 22, 2020
West Windsor, VT
Vermont 100 Endurance Race
Jul 17, 2021
Tyler, TX
Piney Woods Ultra
Sep 18, 2021
Honolulu, HI
Hawaii Kai Ultra Run - Kalama Valley
Dec 19, 2020
Duluth, MN
Wild Duluth Races
Oct 16, 2021
Rockaway, NJ
Wildcat Ridge Romp Trail Races
Aug 14, 2021
Dubuque, IA
Mines of Spain 100
Oct 15, 2021
Silverton, CO
Silverton Ultra Dirty
Aug 6, 2021
Ardmore, OK
Lake Murray Endurance Run
Oct 23, 2021
Jackson, MS
Big Butts
Jul 31, 2021
Cerritos, CA
Orange Curtain Runs
Apr 17, 2021
Apr 16, 2021
McClellanville, SC
Swamp Fox Ultra
Nov 8, 2021
Nov 12, 2021
Nov 13, 2021
Spartanburg, SC
One Epic Run
Dec 7, 2019
Ocala, FL
Wild Things Races
Jan 18, 2020
Bandera, TX
Bandera Endurance Run
Jan 9, 2021
Rocky Point, NY
Tesla Hertz Run
Oct 9, 2021
Flower Mound, TX
Knob Hills Trail Race
Aug 28, 2021
Toledo, OH
Miakonda Trail Ultra
Sep 4, 2021
Stinson Beach, CA
Miwok 100K
May 7, 2022
Apr 23, 2021
May 2, 2021
Stillwater, OK
Lake McMurtry Run
Apr 10, 2021
Ottawa, KS
Prairie Spirit Trail Ultra Races
Mar 27, 2021
Kansas Rails-to-Trails Extravaganza
Oct 23, 2021
Springville, UT
Kat'cina Mosa 100K Mountain Run
Aug 7, 2021
Charlottesville, VA
UROC 100K, Uber Rock 50K & Cruxy 25K
May 1, 2021
Virgil, NY
Virgil Crest Ultras
Sep 11, 2021
Las Cruces, NM
Hot Chili Pepper Ultras
Mar 15, 2019
Fiesta Grande Ultras
Apr 27, 2019
Zombie Ultras
Nov 2, 2019
Sierra Vista Trail Runs
Feb 29, 2020
Mar 1, 2020
Fiesta Series
Aug 27, 2020
Aug 28, 2020
Aug 29, 2020
Aug 30, 2020
Homer, AK
Homer Epic
Mar 13, 2021
Ashland, OR
Siskiyou Out Back Trail Run
Jul 10, 2021
Pullman, WA
Palouse 100K
Apr 19, 2020
Norman, OK
Thunderbird Trail Run
Nov 13, 2021
Chesapeake, VA
Tidewater Striders Dismal Swamp 100k & 50K
Dec 12, 2020
Hilo, HI
Under the Moon
Jun 26, 2021
Hot Springs, AR
Run LOViT
Feb 26, 2022
Feb 25, 2022
Bishop, CA
Bishop High Sierra Ultras
May 22, 2021
Brooksville, FL
Croom Zoom
May 22, 2021
Phoenicia, NY
Catskill Mountain 100K
Aug 9, 2020
Plain, WA
Plain Endurance Runs
Sep 18, 2021
Pinckney, MI
Run Woodstock
Sep 10, 2021
Sep 11, 2021
Sep 12, 2021
San Francisco, CA
Golden Gate Trail Classic
Nov 20, 2021
Nov 21, 2021
Cross River, NY
Raven Rocks Run
Nov 7, 2021
San Angelo, TX
Crazy Desert Trail Race
Mar 6, 2021
Oakridge, OR
Waldo 100K
Aug 21, 2021
New Preston, CT
Jack Bristol Lake Waramaug Ultra Races
Apr 26, 2020
La Grange, WI
Kettle Moraine 100 Endurance Runs
Jun 12, 2021
Truckee, CA
Castle Peak 100K
Aug 14, 2021
Cumberland, RI
Survival of the F.I.T.test 24 Hour Trail Ultra
Oct 23, 2021
Salinas, CA
Ordnance 100K
Feb 5, 2022
Albion, IN
Indiana Trail 100
Oct 9, 2021
San Antonio, TX
El Taco Loco
Oct 23, 2021
Jim Thorpe, PA
Boulder Field Ultra
Sep 11, 2021
San Diego, CA
Sycamore Canyon Trail Race
Sep 5, 2021
Pensacola, FL
Wildcat Ultras
Sep 4, 2021
Cassoday, KS
Heartland
Oct 9, 2021
Oct 8, 2021
Triangle, VA
Devil Dog Ultras
Dec 5, 2020
Seeley Lake, MT
Montana 100K
Jun 12, 2021
Millburn, NJ
Mayapple Trail Run
May 16, 2020
Fincastle, VA
Hellgate 100K
Dec 11, 2021
Castro Valley, CA
Dick Collins Firetrails
Sep 25, 2021
Trabuco Canyon, CA
Baldy Marathons
May 9, 2020
Titusville, PA
Oil Creek 100 Trail Runs
Oct 16, 2021
Tahlequah, OK
Pumpkin Holler Hunnerd
Oct 16, 2021
Pine, AZ
Zane Grey 100K
Apr 24, 2021
Beaver, UT
Tushars Mountain Runs
Jul 31, 2021
Rocksprings, TX
J & J Race and Trail Running Reunion
Mar 11, 2022
Harrison, TN
Run Amok
Nov 14, 2020
Palmer Lake, CO
Kickers Endurance Run
Jul 17, 2021
Port Allen, LA
Children of the Cane
Nov 13, 2021
Burns, TN
Mo' Bell
Oct 10, 2020
Oct 11, 2020
Paris, TX
Paris Pair
Sep 25, 2021
Sep 24, 2021
Wellsboro, PA
Pine Creek Challenge
Sep 11, 2021
Farmville, VA
Freight Train 50K/100K
Dec 12, 2020
Cascade Locks, OR
Gorge Waterfalls 100K
Apr 11, 2020 - Hoping for 2021
Corolla, NC
Blackbeard's Revenge 100
Mar 26, 2022
Seaside, OR
100K Relay on the Prom
May 14, 2021
North Bonneville, WA
Strawberry Fields Forever
Jun 26, 2021
Belleville, WI
Badger Trail Races
Jul 31, 2021
Aug 1, 2021
Meriden, KS
Free State Trail Run
Apr 17, 2021
Gold Beach, OR
Secret Beach 100K/50M
Oct 3, 2020
Blairstown, NJ
NJ Ultra Festival
Mar 27, 2021
High Ridge, MO
Shippey Endurance Runs
Jan 9, 2021
Jan 10, 2021
Elizabethtown, NC
Mission 100K
Mar 19, 2022
Mayer, AZ
Black Canyon Ultras
Feb 12, 2022
Waimea, HI
Under the Moon
Jun 26, 2021
Canal Fulton, OH
Eagle Up Ultra
Jun 5, 2021
Mayfield, OH
Conquer the Castle
Oct 2, 2021
Carthage, MO
36 Hours Of Jack
Dec 7, 2019
Norton, VA
Cloudsplitter 100
Oct 16, 2021
Cat Spring, TX
Brazos Bend 50
Apr 3, 2021
Habanero Hundred
Aug 14, 2021
Booneville, IA
Booneville Backroads Ultra
Sep 4, 2021
Pinson, TN
Dream Chaser
Oct 5, 2019
Butte Meadows, CA
Loco Go Big or Go Home Challenge
Jun 5, 2021
Hewitt, NJ
Wawayanda Wonderful 100
Sep 25, 2021
Naples, NY
Twisted Branch Trail Run
Aug 21, 2021
Port Gamble, WA
Lumberjack Endurance Runs
Jun 12, 2021
Littlefield, AZ
Grandmaster Ultras
Feb 11, 2022
Forksville, PA
Worlds End Ultramarathon
Jun 5, 2021
Bend, TX
Tinajas Ultra
Dec 5, 2020
Fort Pierce, FL
Saint Lucie Skeeter Skoot
Dec 11, 2021
Quitaque, TX
Wild Canyon Ultra
Apr 17, 2021
Forest City, IL
Temptation 200 Ultras
Sep 11, 2021
Chesterfield, MA
Chesterfield Gorge Ultra and 25K Race
May 30, 2020
May 31, 2020
North Bend, PA
Black Forest Ultra 100K
Oct 3, 2021
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City Location
1. Hot Chili Pepper Ultras
-
Past DateMar 15, 2019Friday
-
24H, 100M, 100K, 50M run
More Information
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Las Cruces, NM
Dona Ana County, NM
2. Fiesta Grande Ultras
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Past DateApr 27, 2019Saturday
-
24H, 100M, 100K, 50M run
More Information
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Las Cruces, NM
Dona Ana County, NM
3. Dream Chaser
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Past DateOct 5, 2019Saturday
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100M, 100K, 50M, 50K, 26.2M, 13.1M, 10K, 5K, 1M run
More Information
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Pinson, TN
Madison County, TN
4. PALM100 Ultras
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CancelledOct 26, 2019Saturday
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100K, 50M, 50K, 32K run | 100K, 50K relay
More Information
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Deerfield Beach, FL
Broward County, FL
5. Zombie Ultras
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Past DateNov 2, 2019Saturday
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24H, 100M, 100K, 50M run
More Information
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Las Cruces, NM
Dona Ana County, NM
6. 36 Hours Of Jack
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Past DateDec 7, 2019Saturday
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200K, 100M, 100K, 80K, 50K, 30K, 15K, 5K run
More Information
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Carthage, MO
Jasper County, MO
7. One Epic Run
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CancelledDec 7, 2019Saturday
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24H, 100K, 50K, 26.2M, 13.1M, 5K run
More Information
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Spartanburg, SC
Spartanburg County, SC
8. Wild Things Races
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Past DateJan 18, 2020Saturday
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100K, 50M, 50K, 26.2M, 26.2K, 13.1M, 10K, 5K run
More Information
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Ocala, FL
Marion County, FL
9. Iron Horse Endurance Runs
-
Past DateFeb 8, 2020Saturday
-
100M, 100K, 50M trail run
More Information
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Florahome, FL
Putnam County, FL
10. Sierra Vista Trail Runs
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Past DateFeb 29, 2020Saturday
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100K, 50K, 13.1M trail run | 100K relay
More Information
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Las Cruces, NM
Dona Ana County, NM
11. Gorge Waterfalls 100K
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CancelledApr 11, 2020SaturdayHoping for 2021
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100K trail run
More Information
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Cascade Locks, OR
Hood River County, OR
12. Palouse 100K
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CancelledApr 19, 2020Sunday
-
100K trail run | 100K relay
More Information
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Pullman, WA
Whitman County, WA
13. Jack Bristol Lake Waramaug Ultra Races
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Past DateApr 26, 2020Sunday
-
100K, 50M, 50K run
More Information
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New Preston, CT
Litchfield County, CT
14. Baldy Marathons
-
Past DateMay 9, 2020Saturday
-
100M, 100K, 50K trail run
More Information
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Trabuco Canyon, CA
Orange County, CA
15. Mayapple Trail Run
-
Past DateMay 16, 2020Saturday
-
100K, 50K, 20M, 10M trail run
More Information
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Millburn, NJ
Essex County, NJ
16. Chesterfield Gorge Ultra and 25K Race
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Past DateMay 30, 2020Saturday
-
100M, 100K, 50M, 50K trail run
More Information
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Chesterfield, MA
Hampshire County, MA
17. Catskill Mountain 100K
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CancelledAug 9, 2020Sunday
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100K run | 100K relay
More Information
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Phoenicia, NY
Ulster County, NY
18. Green Lakes Endurance Runs
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Past DateAug 22, 2020Saturday
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100K, 50K trail run
More Information
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Fayetteville, NY
Onondaga County, NY
19. Fiesta Series
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CancelledAug 29, 2020Saturday
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24H, 100M, 100K, 50M, 50K, 26.2M, 13.1M, 10K, 5K run
More Information
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Las Cruces, NM
Dona Ana County, NM
20. Zion Ultras and Trail Half Marathon
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Past DateSep 26, 2020Saturday
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100K, 50K, 13.1M trail run
More Information
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Virgin, UT
Washington 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.