100Ks in the USA
Indianapolis, IN
Indy Piston Endurance Run
Jun 4, 2022
Nashville, IN
Dances With Dirt - Gnaw Bone, IN
May 21, 2022
Mt. Hood, OR
Wy'east Howl Trail Run
Jul 16, 2022
Glen Rose, TX
Dinosaur Valley Endurance Run
Nov 19, 2022
Nov 20, 2022
Florahome, FL
Iron Horse
Feb 5, 2022
Sacramento, CA
No'to'mom Endurance Runs
Mar 26, 2022
Big Bear Lake, CA
Kodiak Ultra Marathons
Aug 19, 2022
Aug 20, 2022
Fountain Hills, AZ
Javelina Jundred
Oct 29, 2022
Deerfield Beach, FL
PALM100 Ultras
Oct 26, 2019
Fayetteville, NY
Green Lakes Endurance Runs
Aug 27, 2022
Bend, OR
Timberjack Ultramarathon
Oct 8, 2022
Tyler, TX
Piney Woods Ultra
Sep 24, 2022
Honolulu, HI
Hawaii Kai Ultra Run - XTreme
Jul 23, 2022
Dubuque, IA
Mines of Spain 100
Oct 14, 2022
Silverton, CO
Silverton Ultra Dirty
Aug 5, 2022
Aug 6, 2022
Ardmore, OK
Lake Murray Endurance Run
Oct 29, 2022
Jackson, MS
Big Butts
Jul 30, 2022
Cerritos, CA
Orange Curtain
Jun 25, 2022
Jun 24, 2022
McClellanville, SC
Swamp Fox Ultra
Nov 7, 2022
Nov 10, 2022
Nov 12, 2022
Bandera, TX
Bandera Endurance Run
Jan 7, 2023
Rocky Point, NY
Tesla Hertz Run
Oct 8, 2022
Flower Mound, TX
Knob Hills Trail Race
Oct 1, 2022
Toledo, OH
Miakonda Trail Ultra
Sep 3, 2022
Dripping Springs, TX
Dos Senderos
Mar 5, 2022
Stinson Beach, CA
Miwok 100K
May 6, 2023
Stillwater, OK
Lake McMurtry Run
Apr 8, 2023
Shawnee, KS
Tale of Two Trails
Jul 16, 2022
Ottawa, KS
Prairie Spirit Trail Ultra Races
Mar 26, 2022
Kansas Rails-to-Trails Extravaganza
Oct 29, 2022
Springville, UT
Kat'cina Mosa 100K Mountain Run
Aug 6, 2022
Chatsworth, GA
DT 100 Stone Anvil
Apr 20, 2022
Apr 21, 2022
Apr 22, 2022
Apr 23, 2022
Endurance Hunter 100
Apr 1, 2023
Traverse City, MI
Traverse City Trail Running Festival
Apr 23, 2022
Apr 22, 2022
Virgil, NY
Virgil Crest Ultras
Sep 10, 2022
Las Cruces, NM
Sierra Vista Trail Runs
Mar 5, 2022
Homer, AK
Homer Epic
Mar 18, 2023
Ashland, OR
Siskiyou Out Back Trail Run
Jul 9, 2022
Norman, OK
Thunderbird Trail Run
Nov 12, 2022
Salmon, ID
Beaverhead Endurance Runs
Jul 9, 2022
Hilo, HI
Under the Moon
Jun 11, 2022
Hot Springs, AR
Run LOViT
Feb 26, 2022
Feb 25, 2022
Bishop, CA
Bishop High Sierra Ultras
May 21, 2022
Brooksville, FL
Croom Zoom
Jan 1, 2022
Huntsville, TX
Rocky Raccoon 100 Trail Race
Feb 4, 2023
Phoenicia, NY
Catskill Mountain 100K
Aug 9, 2020
Plain, WA
Plain Endurance Runs
Sep 17, 2022
Kirkwood, CA
Kirkwood's Ultras
Aug 6, 2022
Pinckney, MI
Run Woodstock
Sep 9, 2022
Sep 10, 2022
Sep 11, 2022
San Francisco, CA
Golden Gate Trail Classic
Nov 18, 2022
Nov 19, 2022
Nov 20, 2022
San Angelo, TX
Crazy Desert Trail Race
Mar 5, 2022
Oakridge, OR
Waldo 100K
Aug 13, 2022
New Preston, CT
Jack Bristol Lake Waramaug Ultra Races
Apr 24, 2022
La Grange, WI
Kettle Moraine 100 Endurance Runs
Jun 11, 2022
Truckee, CA
Castle Peak 100K
Aug 14, 2021
Cumberland, RI
Survival of the F.I.T.test 24 Hour Trail Ultra
Oct 22, 2022
Salinas, CA
Ordnance 100K
Feb 5, 2022
Albion, IN
Indiana Trail 100
Oct 8, 2022
West Columbia, TX
Grit Ultra Endurance Challenge
Dec 31, 2022
Jim Thorpe, PA
Boulder Field Ultra
Sep 10, 2022
San Diego, CA
Sycamore Canyon Trail Race
Feb 25, 2023
Pensacola, FL
Wildcat Ultras
Sep 3, 2022
Cassoday, KS
Heartland
Oct 8, 2022
Oct 7, 2022
Triangle, VA
Devil Dog Ultras
Dec 3, 2022
Hollidaysburg, PA
Ironstone 100K
Jul 9, 2022
Millburn, NJ
Mayapple Trail Run
May 21, 2022
West Milford, NJ
Highlands Trail Festival
May 14, 2022
Castro Valley, CA
Dick Collins Firetrails
Sep 24, 2022
Titusville, PA
Oil Creek 100 Trail Runs
Oct 15, 2022
Tahlequah, OK
Pumpkin Holler Hunnerd
Oct 15, 2022
Waynesville, MO
Bad Dawg Ultra
Aug 20, 2022
Pine, AZ
Zane Grey 100K
Apr 23, 2022
Blue Ridge, GA
Endurance Hunter 100
Apr 1, 2023
Beaver, UT
Tushars Mountain Runs
Jul 30, 2022
Rocksprings, TX
J & J Race and Trail Running Reunion
Mar 10, 2023
Harrison, TN
Run Amok
Nov 14, 2020
Palmer Lake, CO
Kickers Endurance Run
Jul 17, 2021
Port Allen, LA
Children of the Cane
Oct 29, 2022
Burns, TN
Mo' Bell
Oct 8, 2022
Oct 9, 2022
Paris, TX
Paris Pair
Sep 17, 2022
Wellsboro, PA
Pine Creek Challenge
Sep 10, 2022
Farmville, VA
Freight Train 50K/100K
Dec 10, 2022
Cascade Locks, OR
Gorge Waterfalls
Apr 3, 2022
Apr 2, 2022
Corolla, NC
Blackbeard's Revenge 100
Mar 25, 2023
Seaside, OR
100K Relay on the Prom
May 27, 2022
Blue Diamond, NV
Red Rock Canyon
Nov 12, 2022
North Bonneville, WA
Strawberry Fields Forever
Jun 11, 2022
Middleville, MI
Yankee Springs Trail Run
Jun 3, 2022
Jun 4, 2022
Jun 5, 2022
Belleville, WI
Badger Trail Races
Jul 30, 2022
Jul 31, 2022
Old Fort, NC
Leadmine Nine
Oct 1, 2022
Meriden, KS
Free State Trail Run
Jun 12, 2021
Gold Beach, OR
Secret Beach 100K/50M
Aug 27, 2022
Blairstown, NJ
NJ Ultra Festival
Mar 27, 2021
High Ridge, MO
Shippey Endurance Runs
Jan 14, 2023
Jan 15, 2023
Elizabethtown, NC
Mission 100K
Mar 19, 2022
Mayer, AZ
Black Canyon Ultras
Feb 18, 2023
Waimea, HI
Under the Moon
Jun 11, 2022
Canal Fulton, OH
Eagle Up Ultra
Jun 4, 2022
Hookstown, PA
Rabid Raccoon 100
Mar 19, 2022
Mayfield, OH
Conquer the Castle
Nov 5, 2022
Sylvan Grove, KS
Hell Creek 100
Sep 30, 2022
Oct 1, 2022
Norton, VA
Cloudsplitter 100
Oct 15, 2022
Lakeshore, CA
China Peak Running Festival
Sep 17, 2022
Cat Spring, TX
Habanero Hundred
Aug 20, 2022
Booneville, IA
Booneville Backroads Ultra
Sep 3, 2022
Butte Meadows, CA
Loco Go Big or Go Home Challenge
Jun 4, 2022
Hewitt, NJ
Wawayanda Wonderful 100
Sep 10, 2022
Naples, NY
Twisted Branch Trail Run
Aug 20, 2022
Sky Valley, GA
Georgia Sky to Summit 50K
Nov 5, 2022
Port Gamble, WA
Lumberjack Endurance Runs
Jun 11, 2022
Divide, CO
Great Divide Ultra
May 21, 2022
Littlefield, AZ
Grandmaster Ultras
Feb 10, 2023
Forksville, PA
Worlds End Ultramarathon
Jun 4, 2022
Fort Pierce, FL
Saint Lucie Skeeter Skoot
Dec 10, 2022
Quitaque, TX
Wild Canyon Ultra
Apr 23, 2022
Forest City, IL
Temptation 200 Ultras
Sep 10, 2022
Sep 11, 2022
Chesterfield, MA
Chesterfield Gorge Ultra and 25K Race
Jun 4, 2022
Jun 5, 2022
Apple Valley, UT
Zion Ultra Marathons
Apr 8, 2023
Apr 9, 2023
North Bend, PA
Black Forest Ultra 100K
Oct 2, 2022
Vesuvius, VA
UROC 100K, Uber Rock 50K & Cruxy 25K
Apr 30, 2022
Green Valley, CA
Leona Divide
Apr 22, 2023
Silver Hill Meadow, VT
Vermont 100 Endurance Race
Jul 16, 2022
Hinckley, MN
Fire Tower Trail Races
Oct 1, 2022
Imler, PA
Lost Turkey Trail Races
Aug 27, 2022
Brazos Bend State Park, TX
Brazos Bend 50
Apr 1, 2023
 |
 |
 |
 |
 |
 |
 |
 |
| Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
City Location
Featured Listing
1. Loco Go Big or Go Home Challenge
-
Jun 4, 2022Saturday
-
100M, 100K, 50K, 13.1M, 10K run
More Information
-
Butte Meadows, CA
Butte County, CA
1. PALM100 Ultras
-
CancelledOct 26, 2019Saturday
-
100K, 50M, 50K, 32K run | 100K, 50K relay
More Information
-
Deerfield Beach, FL
Broward County, FL
2. Catskill Mountain 100K
-
CancelledAug 9, 2020Sunday
-
100K run | 100K relay
More Information
-
Phoenicia, NY
Ulster County, NY
3. Run Amok
-
Past DateNov 14, 2020Saturday
-
100M, 100K, 50M, 50K, 26.2M, 13.1M, 10K, 5K run | kids run
More Information
-
Harrison, TN
Hamilton County, TN
4. NJ Ultra Festival
-
Past DateMar 27, 2021Saturday
-
100M, 100K, 50M, 50K, 26.2M, 13.1M trail run
More Information
-
Blairstown, NJ
Warren County, NJ
5. Free State Trail Run
-
Past DateJun 12, 2021Saturday
-
100K, 40M, 26.2M, 13.1M trail run | 100K relay
More Information
-
Meriden, KS
Jefferson County, KS
6. Kickers Endurance Run
-
CancelledJul 17, 2021Saturday
-
100M, 100K, 50M, 50K trail run
More Information
-
Palmer Lake, CO
El Paso County, CO
7. Castle Peak 100K
-
Past DateAug 14, 2021Saturday
-
100K trail run
More Information
-
Truckee, CA
Nevada County, CA
8. Croom Zoom
-
Past DateJan 1, 2022Saturday
-
100K, 50K, 25K trail run
More Information
-
Brooksville, FL
Hernando County, FL
9. Frozen: H3
-
Past DateJan 13, 2022Thursday
-
100M, 100K, 60K, 16.3M trail run | 100M relay
More Information
-
Bethera, SC
Berkeley County, SC
10. Iron Horse
-
Past DateFeb 5, 2022Saturday
-
100M, 100K, 50M trail run
More Information
-
Florahome, FL
Putnam County, FL
11. Ordnance 100K
-
Past DateFeb 5, 2022Saturday
-
100K trail run
More Information
-
Salinas, CA
Monterey County, CA
12. Run LOViT
-
Past DateFeb 26, 2022Saturday
-
100K run
More Information
-
Hot Springs, AR
Garland County, AR
13. Crazy Desert Trail Race
-
Past DateMar 5, 2022Saturday
-
100K, 50K, 13.1M, 10K, 5K trail run
More Information
-
San Angelo, TX
Tom Green County, TX
14. Dos Senderos
-
Past DateMar 5, 2022Saturday
-
100K, 50K, 20M, 10M trail run
More Information
-
Dripping Springs, TX
Hays County, TX
15. Sierra Vista Trail Runs
-
Past DateMar 5, 2022Saturday
-
100K, 50K, 13.1M trail run
More Information
-
Las Cruces, NM
Dona Ana County, NM
16. Extreme North Dakota Sandhills Ultra Run Experience (END-SURE)
-
Past DateMar 19, 2022Saturday
-
100K, 50K trail run
More Information
-
McLeod, ND
Ransom County, ND
17. Mission 100K
-
CancelledMar 19, 2022Saturday
-
100K, 10K trail run | 100K relay
More Information
-
Elizabethtown, NC
Bladen County, NC
18. Pistol Ultra Run
-
Past DateMar 19, 2022Saturday
-
100M, 100K, 50M, 50K run | 50K relay
More Information
-
Alcoa, TN
Blount County, TN
19. Rabid Raccoon 100
-
Past DateMar 19, 2022Saturday
-
100M, 100K, 20M trail run | 100M relay
More Information
-
Hookstown, PA
Beaver County, PA
20. No'to'mom Endurance Runs
-
CancelledMar 26, 2022Saturday
-
100K, 50K run | 100K, 50K relay
More Information
-
Sacramento, CA
Sacramento County, CA
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.