Upcoming 100Ks in the USA
Lima, OH
UnitedAF Ultramarathon
Oct 19, 2024
Glen Rose, TX
Dinosaur Valley Endurance Run
Nov 23, 2024
Nov 24, 2024
High Hope Endurance Run
May 24, 2025
May 25, 2025
Big Bear Lake, CA
Kodiak Ultra Marathons
Oct 11, 2024
Oct 12, 2024
Fountain Hills, AZ
Javelina Jundred
Oct 26, 2024
Georgetown, TX
Texas Ultra Running Championship
Nov 16, 2024
Bastrop, TX
Cowboy YETI
Jan 25, 2025
Tyler, TX
Piney Woods Ultra
Sep 28, 2024
Honolulu, HI
Hawaii Kai Ultra Run - Kalama Valley
Dec 14, 2024
Hawaii Kai Ultra Run - XTreme
Jul 26, 2025
Jul 27, 2025
Dubuque, IA
Mines of Spain 100
Oct 18, 2024
Ardmore, OK
Lake Murray Endurance Run
Oct 26, 2024
Jackson, MS
Big Butts
Jul 19, 2025
Bandera, TX
Bandera Endurance Trail Race
Jan 11, 2025
Rocky Point, NY
Tesla Hertz Run
Oct 12, 2024
Bethel, OH
East Fork 100M/100K
Aug 23, 2025
Stinson Beach, CA
Miwok 100K
May 3, 2025
Stillwater, OK
Lake McMurtry Run
Apr 12, 2025
Ottawa, KS
Kansas Rails-to-Trails Extravaganza
Oct 26, 2024
Prairie Spirit Trail Ultra Races
Mar 22, 2025
Moab, UT
Canyonlands Ultra
Oct 26, 2024
Traverse City, MI
Traverse City Trail Running Festival
May 10, 2025
May 9, 2025
Homer, AK
Homer Epic
Mar 8, 2025
Comfort, TX
Dos Senderos
Mar 1, 2025
Norman, OK
Thunderbird Trail Run
Nov 9, 2024
Madison, WI
MadCity Ultras
Apr 12, 2025
Lake Hughes, CA
Leona Divide
Apr 12, 2025
Ipswich, MA
TARC Stone Cat Trail Festival
Nov 2, 2024
Hot Springs, AR
Run LOViT
Feb 22, 2025
Bishop, CA
Bishop High Sierra Ultras
May 17, 2025
Brooksville, FL
Croom Zoom
Jan 4, 2025
Beaver Falls, PA
Rabid Raccoon 100
Mar 15, 2025
Mar 14, 2024
Mar 16, 2025
Huntsville, TX
Rocky Raccoon 100 Trail Race
Feb 1, 2025
Goodyear, AZ
Fat Ox
Nov 22, 2024
Kings Mountain, NC
Beast of the East 100
Dec 14, 2024
Martinsville, IN
MoMoFo100k and 20 mile Fun Run
Jun 7, 2025
Jun 6, 2025
San Angelo, TX
Crazy Desert Trail Race
Mar 8, 2025
New Preston, CT
Jack Bristol Lake Waramaug Ultra Races
Apr 27, 2025
La Grange, WI
Kettle Moraine 100 Endurance Runs
Jun 14, 2025
Cumberland, RI
Survival of the F.I.T.test 24 Hour Trail Ultra
Oct 19, 2024
Albion, IN
Indiana Trail 100
Oct 12, 2024
San Diego, CA
Sycamore Canyon Trail Race
Feb 22, 2025
Cassoday, KS
Heartland
Oct 12, 2024
Oct 11, 2024
Triangle, VA
Devil Dog Ultras
Dec 7, 2024
Hollidaysburg, PA
Ironstone 100K
Jul 12, 2025
Castro Valley, CA
Dick Collins Firetrails
Sep 29, 2024
Titusville, PA
Oil Creek 100 Trail Runs
Oct 12, 2024
Fairplay, CO
Silverheels Trail Runs
Jul 11, 2025
Jul 12, 2025
Tahlequah, OK
Pumpkin Holler Hunnerd
Oct 19, 2024
Mesquite, NV
Grandmaster Ultras
Mar 1, 2025
Mar 2, 2025
Johnson City, TX
Desert Wolf
Sep 28, 2024
Burns, TN
Mo' Bell
Oct 12, 2024
Needville, TX
Brazos Bend 100
Dec 7, 2024
Farmville, VA
Freight Train 50K/100K
Dec 7, 2024
Cascade Locks, OR
Gorge Waterfalls
Apr 13, 2025
Apr 12, 2025
Apr 11, 2025
Blue Diamond, NV
Red Rock Canyon 100K
Nov 9, 2024
Belleville, WI
Badger Trail Races
Aug 2, 2025
Aug 3, 2025
Fuquay Varina, NC
Agape 100K + 50K
May 17, 2025
Jacksboro, TX
North Texas Ultra
Feb 15, 2025
High Ridge, MO
The Shippey Endurance Runs
Jan 18, 2025
Jan 19, 2025
Mayer, AZ
Black Canyon Ultras
Feb 8, 2025
Canal Fulton, OH
Eagle Up Ultra
Jun 7, 2025
Mayfield, OH
Conquer the Castle
Nov 2, 2024
Bethera, SC
Frozen: H3
Jan 11, 2025
Sylvan Grove, KS
Hell Creek 100
Sep 28, 2024
Friant, CA
San Joaquin River Trail Run
Dec 7, 2024
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
Natural Bridge, VA
Hellgate 100K
Dec 14, 2024
Oak Hill, WV
Falling Water 100K
Apr 26, 2025
Sky Valley, GA
Sky to Summit Trail Run
Oct 26, 2024
Logandale, NV
Fire Fest Ultra
Nov 23, 2024
Nov 24, 2024
Nov 22, 2024
Divide, CO
Great Divide Ultra
Jun 7, 2025
Jun 8, 2025
Keithville, LA
Screaming Monkey 100
Nov 2, 2024
Forksville, PA
Worlds End Ultramarathon
May 31, 2025
Fort Pierce, FL
Saint Lucie Skeeter Skoot
Nov 23, 2024
Quitaque, TX
Wild Canyon Ultra
Apr 12, 2025
Blacksburg, SC
Mountaineer Rumble
Nov 2, 2024
Apple Valley, UT
Zion Ultras
Apr 12, 2025
Apr 11, 2025
Davis, OK
Arbuckle 100
Feb 22, 2025
Silver Hill Meadow, VT
Vermont 100 Endurance Race
Jul 18, 2025
Hinckley, MN
Fire Tower Trail Races
Oct 5, 2024
Hyner Run State Park, PA
Black Forest Ultra 100K
Oct 6, 2024
 |
 |
 |
 |
 |
 |
 |
 |
| Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
| Featured Listings | ||||
|---|---|---|---|---|
| No | Race Date | Race | Location | Options |
| 1 |
Past Date
Mar 14, 2024
Thursday
Mar 15, 2025
Saturday
1 more
|
Rabid Raccoon 100
100M, 100K, 13.1M, 5K trail run | 100M relay | 5K obstacle run
More Information
 |
Beaver Falls, PA
Beaver County, PA
|
|
| 2 |
Sep 29, 2024
Sunday
|
Dick Collins Firetrails
100K, 50M, 26.2M trail run
More Information
|
Castro Valley, CA
Alameda County, CA
|
|
City Location
| No | Race Date | Race | Location | Options |
|---|---|---|---|---|
| 21 |
Oct 19, 2024
Saturday
|
Wild Duluth Races - Wild Duluth 100K/50K, Harder 'n Heck Half & Terribly Tough 10K
100K, 50K trail run
More Information
|
Duluth, MN
St Louis County, MN
|
|
| 22 |
Oct 26, 2024
Saturday
|
Canyonlands Ultra
100K, 50M, 50K, 26.2M, 13.1M, 15K trail run
More Information
|
Moab, UT
Grand County, UT
|
|
| 23 |
Oct 26, 2024
Saturday
|
Javelina Jundred
100M, 100K, 31K trail run
More Information
|
Fountain Hills, AZ
Maricopa County, AZ
|
|
| 24 |
Oct 26, 2024
Saturday
|
Kansas Rails-to-Trails Extravaganza
100M, 100K, 50M, 50K, 26.2M, 13.1M trail run
More Information
|
Ottawa, KS
Franklin County, KS
|
|
| 25 |
Oct 26, 2024
Saturday
|
Lake Murray Endurance Run
100M, 100K, 50K, 25K, 5M trail run
More Information
|
Ardmore, OK
Carter County, OK
|
|
| 26 |
Oct 26, 2024
Saturday
|
Sky to Summit Trail Run
100K, 50K, 8.5M trail run
More Information
|
Sky Valley, GA
Rabun County, GA
|
|
| 27 |
Nov 2, 2024
Saturday
|
Conquer the Castle
100K, 50K, 20M, 10M, 5K run
More Information
|
Mayfield, OH
Cuyahoga County, OH
|
|
| 28 |
Nov 2, 2024
Saturday
|
Mountaineer Rumble
100M, 100K, 50K trail run
More Information
|
Blacksburg, SC
Cherokee County, SC
|
|
| 29 |
Nov 2, 2024
Saturday
|
Screaming Monkey 100
100M, 100K, 50K, 25K trail run
More Information
|
Keithville, LA
Caddo County, LA
|
|
| 30 |
Nov 2, 2024
Saturday
|
TARC Stone Cat Trail Festival
100K, 50M, 26.2M, 13.1M, 10K trail run
More Information
|
Ipswich, MA
Essex County, MA
|
|
| 31 |
Nov 9, 2024
Saturday
|
Red Rock Canyon 100K
100K, 50K, 17K, 12K trail run
More Information
|
Blue Diamond, NV
Clark County, NV
|
|
| 32 |
Nov 9, 2024
Saturday
|
Thunderbird Trail Run
100K, 50K, 25K, 5K trail run
More Information
|
Norman, OK
Cleveland County, OK
|
|
| 33 |
Nov 16, 2024
Saturday
|
Texas Ultra Running Championship
100K, 50K, 15K trail run
More Information
|
Georgetown, TX
Williamson County, TX
|
|
| 34 |
Nov 22, 2024
Friday
|
Fat Ox
48H, 24H, 100M, 12H, 100K, 50M, 6H, 50K run
More Information
|
Goodyear, AZ
Maricopa County, AZ
|
|
| 35 |
Nov 23, 2024
Saturday
|
Dinosaur Valley Endurance Run
100M, 100K trail run
More Information
|
Glen Rose, TX
Somervell County, TX
|
|
| 36 |
Nov 23, 2024
Saturday
|
Fire Fest Ultra
100M, 100K, 50M, 50K, 26.2M, 13.1M, 10K, 5K trail run
More Information
|
Logandale, NV
Clark County, NV
|
|
| 37 |
Nov 23, 2024
Saturday
|
Saint Lucie Skeeter Skoot
100K, 50K trail run | 100K, 50K relay
More Information
|
Fort Pierce, FL
St Lucie County, FL
|
|
| 38 |
Dec 7, 2024
Saturday
|
Brazos Bend 100
100M, 100K, 26.2M, 13.1M trail run
More Information
|
Needville, TX
Fort Bend County, TX
|
|
| 39 |
Dec 7, 2024
Saturday
|
Devil Dog Ultras
100M, 100K, 50K trail run
More Information
|
Triangle, VA
Prince William County, VA
|
|
| 40 |
Dec 7, 2024
Saturday
|
Freight Train 50K/100K
100K, 50K, 13.1M trail run
More Information
|
Farmville, VA
Prince Edward County, VA
|
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.