100Ks in the USA
Indianapolis, IN
Indy Piston Endurance Run
Jun 5, 2021
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 20, 2021
Nov 21, 2021
Florahome, FL
Iron Horse
Feb 5, 2022
Sacramento, CA
No'to'mom Endurance Runs
Oct 2, 2021
Big Bear Lake, CA
Kodiak Ultra Marathons
Aug 20, 2021
Aug 21, 2021
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 - Kalama Valley
Jul 24, 2021
Duluth, MN
Wild Duluth Races
Oct 15, 2022
Lebanon, OH
The Forge: Trail Ultra Run
Jun 26, 2021
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 23, 2021
San Jose, CA
Quicksilver Endurance Runs
May 14, 2022
Jackson, MS
Big Butts
Jul 30, 2022
Cerritos, CA
Orange Curtain
Jul 17, 2021
Jul 16, 2021
McClellanville, SC
Swamp Fox Ultra
Nov 7, 2022
Nov 10, 2022
Nov 12, 2022
Spartanburg, SC
One Epic Run
Mar 19, 2021
Bandera, TX
Bandera Endurance Run
Jan 8, 2022
Rocky Point, NY
Tesla Hertz Run
Oct 8, 2022
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
Stillwater, OK
Lake McMurtry Run
Apr 10, 2021
Ottawa, KS
Kansas Rails-to-Trails Extravaganza
Oct 23, 2021
Prairie Spirit Trail Ultra Races
Mar 26, 2022
Springville, UT
Kat'cina Mosa 100K Mountain Run
Aug 6, 2022
Chatsworth, GA
Endurance Hunter 100
Apr 9, 2022
DT 100 Stone Anvil
Apr 20, 2022
Apr 21, 2022
Apr 22, 2022
Apr 23, 2022
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
Chili Pepper Series
Mar 12, 2022
Mar 13, 2022
Homer, AK
Homer Epic
Mar 13, 2021
Ashland, OR
Siskiyou Out Back Trail Run
Jul 9, 2022
Pullman, WA
Palouse 100K
Apr 19, 2020
Norman, OK
Thunderbird Trail Run
Nov 13, 2021
Chesapeake, VA
Tidewater Strider Dismal Swamp 100K & 50K
Dec 4, 2021
Salmon, ID
Beaverhead Endurance Runs
Jul 9, 2022
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
Jan 1, 2022
Huntsville, TX
Rocky Raccoon 100 Trail Race
Feb 5, 2022
Phoenicia, NY
Catskill Mountain 100K
Aug 9, 2020
Plain, WA
Plain Endurance Runs
Sep 18, 2021
Pinckney, MI
Run Woodstock
Sep 9, 2022
Sep 10, 2022
Sep 11, 2022
San Francisco, CA
Golden Gate Trail Classic
Nov 20, 2021
Nov 21, 2021
San Angelo, TX
Crazy Desert Trail Race
Mar 5, 2022
Oakridge, OR
Waldo 100K
Aug 21, 2021
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 23, 2021
Salinas, CA
Ordnance 100K
Feb 5, 2022
Albion, IN
Indiana Trail 100
Oct 8, 2022
West Columbia, TX
Grit Ultra Endurance Challenge
Dec 31, 2021
Jim Thorpe, PA
Boulder Field Ultra
Sep 10, 2022
San Diego, CA
Sycamore Canyon Trail Race
Feb 5, 2022
Pensacola, FL
Wildcat Ultras
Sep 4, 2021
Cassoday, KS
Heartland
Oct 9, 2021
Oct 8, 2021
Triangle, VA
Devil Dog Ultras
Dec 4, 2021
Millburn, NJ
Mayapple Trail Run
Oct 16, 2021
Castro Valley, CA
Dick Collins Firetrails
Sep 24, 2022
Trabuco Canyon, CA
Baldy Marathons
May 9, 2020
Titusville, PA
Oil Creek 100 Trail Runs
Oct 16, 2021
Tahlequah, OK
Pumpkin Holler Hunnerd
Oct 15, 2022
Waynesville, MO
Bad Dawg Ultra
Nov 27, 2021
Pine, AZ
Zane Grey 100K
Apr 23, 2022
Blue Ridge, GA
Endurance Hunter 100
Apr 9, 2022
Beaver, UT
Tushars Mountain Runs
Jul 30, 2022
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
Oct 29, 2022
Burns, TN
Mo' Bell
Oct 8, 2022
Oct 9, 2022
Needville, TX
Brazos Bend 50
Apr 9, 2022
Paris, TX
Paris Pair
Sep 25, 2021
Wellsboro, PA
Pine Creek Challenge
Sep 10, 2022
Farmville, VA
Freight Train 50K/100K
Dec 11, 2021
Cascade Locks, OR
Gorge Waterfalls 100K
Apr 11, 2020
Virgin, UT
Zion Ultra Marathons
Apr 9, 2022
Zion Ultras and Trail Half Marathon
Apr 9, 2022
Apr 10, 2022
Corolla, NC
Blackbeard's Revenge 100
Mar 26, 2022
Seaside, OR
100K Relay on the Prom
May 14, 2021
Blue Diamond, NV
Red Rock Canyon
Nov 12, 2022
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
Jun 12, 2021
Gold Beach, OR
Secret Beach 100K/50M
Oct 2, 2021
Blairstown, NJ
NJ Ultra Festival
Mar 27, 2021
High Ridge, MO
Shippey Endurance Runs
Jan 8, 2022
Jan 9, 2022
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 4, 2022
Hookstown, PA
Rabid Raccoon 100
Mar 19, 2022
Mayfield, OH
Conquer the Castle
Oct 2, 2021
Carthage, MO
36 Hours Of Jack
Dec 7, 2019
Norton, VA
Cloudsplitter 100
Oct 15, 2022
Cat Spring, TX
Habanero Hundred
Aug 20, 2022
Booneville, IA
Booneville Backroads Ultra
Sep 4, 2021
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
Port Gamble, WA
Lumberjack Endurance Runs
Jun 12, 2021
Divide, CO
Great Divide Ultra
May 21, 2022
Littlefield, AZ
Grandmaster Ultras
Feb 11, 2022
Forksville, PA
Worlds End Ultramarathon
Jun 4, 2022
Fort Pierce, FL
Saint Lucie Skeeter Skoot
Dec 11, 2021
Quitaque, TX
Wild Canyon Ultra
Apr 23, 2022
Forest City, IL
Temptation 200 Ultras
Sep 11, 2021
Chesterfield, MA
Chesterfield Gorge Ultra and 25K Race
Jun 4, 2022
Jun 5, 2022
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
Nov 6, 2021
Silver Hill Meadow, VT
Vermont 100 Endurance Race
Jul 16, 2022
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| Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
City Location
1. 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
2. 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
3. Gorge Waterfalls 100K
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CancelledApr 11, 2020Saturday
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100K trail run
More Information
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Cascade Locks, OR
Hood River County, OR
4. Palouse 100K
-
CancelledApr 19, 2020Sunday
-
100K trail run | 100K relay
More Information
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Pullman, WA
Whitman County, WA
5. Baldy Marathons
-
Past DateMay 9, 2020Saturday
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100M, 100K, 50K trail run
More Information
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Trabuco Canyon, CA
Orange County, CA
6. 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
7. Run Amok
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Past DateNov 14, 2020Saturday
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100M, 100K, 50M, 50K, 26.2M, 13.1M, 10K, 5K run | kids run
More Information
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Harrison, TN
Hamilton County, TN
8. Headstrong 100 Virtual Race Challenge
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Virtual OpenVirtual OnlyJan 1, 2021Friday
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100K, 10K, 5K run
More InformationVirtual for 2021
9. DART 100K Challenge and Somewhat Legendary 50K
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Past DateFeb 27, 2021Saturday
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100K, 50K run
More Information
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Davidson, NC
Mecklenburg County, NC
10. Homer Epic
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Past DateMar 13, 2021Saturday
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150K, 100K, 50K trail run
More Information
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Homer, AK
Kenai Peninsula Borough County, AK
11. One Epic Run
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Past DateMar 19, 2021Friday
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24H, 100K, 50K, 26.2M, 13.1M, 5K run
More Information
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Spartanburg, SC
Spartanburg County, SC
12. Extreme North Dakota Sandhills Ultra Run Experience (END-SURE)
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Past DateMar 20, 2021Saturday
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100K, 50K trail run
More Information
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McLeod, ND
Ransom County, ND
13. Zodiac Race Series
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Virtual OpenVirtual OnlyMar 21, 2021Sunday
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100M, 100K, 50M, 50K, 26.2M, 13.1M, 10K, 5K, 1M run
More InformationVirtual for 2021/2022
14. NJ Ultra Festival
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Past DateMar 27, 2021Saturday
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100M, 100K, 50M, 50K, 26.2M, 13.1M trail run
More Information
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Blairstown, NJ
Warren County, NJ
15. Lake McMurtry Run
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Past DateApr 10, 2021Saturday
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100K, 50K, 25K, 12K, 5K trail run
More Information
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Stillwater, OK
Payne County, OK
16. 100K Relay on the Prom
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Past DateMay 14, 2021Friday
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100K relay
More Information
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Seaside, OR
Clatsop County, OR
17. Bishop High Sierra Ultras
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Past DateMay 22, 2021Saturday
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100K, 50M, 53K, 20M, 6K trail run
More Information
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Bishop, CA
Inyo County, CA
18. Indy Piston Endurance Run
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Past DateJun 5, 2021Saturday
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100M, 100K, 50M, 50K run
More Information
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Indianapolis, IN
Marion County, IN
19. Free State Trail Run
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Past DateJun 12, 2021Saturday
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100K, 40M, 26.2M, 13.1M trail run | 100K relay
More Information
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Meriden, KS
Jefferson County, KS
20. Lumberjack Endurance Runs
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Past DateJun 12, 2021Saturday
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100M, 100K, 50M trail run
More Information
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Port Gamble, WA
Kitsap County, WA
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.