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
Easton, WA
Ultra Fest
Sep 21, 2024
Fayetteville, NY
Green Lakes Endurance Runs
Aug 24, 2024
Tyler, TX
Piney Woods Ultra
Sep 28, 2024
Honolulu, HI
Hawaii Kai Ultra Run - XTreme
Jul 27, 2024
Hawaii Kai Ultra Run - Kalama Valley
Dec 14, 2024
Dubuque, IA
Mines of Spain 100
Oct 18, 2024
Colorado Springs, CO
Ring the Springs
Jun 22, 2024
Jun 23, 2024
Ardmore, OK
Lake Murray Endurance Run
Oct 26, 2024
Jackson, MS
Big Butts
Jul 20, 2024
Cerritos, CA
Orange Curtain
Jun 22, 2024
Jun 21, 2024
McClellanville, SC
Swamp Fox Ultra
Nov 16, 2024
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 24, 2024
Stinson Beach, CA
Miwok 100K
May 3, 2025
Stillwater, OK
Lake McMurtry Run
Apr 12, 2025
Shawnee, KS
Tale of Two Trails
Jul 13, 2024
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
Springville, UT
Kat'cina Mosa 100K Mountain Run
Aug 3, 2024
Virgil, NY
Virgil Crest Ultras
Sep 14, 2024
Homer, AK
Homer Epic
Mar 8, 2025
Ashland, OR
Siskiyou Out Back Trail Run
Jul 13, 2024
Comfort, TX
Dos Senderos
Mar 1, 2025
Norman, OK
Thunderbird Trail Run
Nov 9, 2024
Madison, WI
MadCity Ultras
Apr 12, 2025
Salmon, ID
Beaverhead Endurance Runs
Jul 13, 2024
Hilo, HI
Under the Moon
Jun 22, 2024
Ipswich, MA
TARC Stone Cat Trail Festival
Nov 2, 2024
Hot Springs, AR
Run LOViT
Feb 22, 2025
Huntsville, TX
Rocky Raccoon 100 Trail Race
Feb 1, 2025
Plain, WA
Plain Endurance Runs
Sep 14, 2024
Pinckney, MI
Run Woodstock
Sep 6, 2024
Sep 7, 2024
Sep 8, 2024
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
Oakridge, OR
Waldo 100K
Aug 3, 2024
New Preston, CT
Jack Bristol Lake Waramaug Ultra Races
Apr 27, 2025
La Grange, WI
Kettle Moraine 100 Endurance Runs
Jun 14, 2025
Albion, IN
Indiana Trail 100
Oct 12, 2024
Jim Thorpe, PA
Boulder Field Ultra
Sep 14, 2024
Pensacola, FL
Wildcat Ultras
Aug 31, 2024
Cassoday, KS
Heartland
Oct 12, 2024
Oct 11, 2024
Hollidaysburg, PA
Ironstone 100K
Jul 13, 2024
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 12, 2024
Jul 13, 2024
Tahlequah, OK
Pumpkin Holler Hunnerd
Oct 19, 2024
Waynesville, MO
Bad Dawg Ultra
Aug 17, 2024
Mesquite, NV
Grandmaster Ultras
Mar 1, 2025
Mar 2, 2025
Beaver, UT
Tushars Mountain Runs
Jul 27, 2024
Johnson City, TX
Desert Wolf
Sep 28, 2024
Burns, TN
Mo' Bell
Oct 12, 2024
Needville, TX
Brazos Bend 100
Dec 7, 2024
Paris, TX
Paris Pair
Sep 21, 2024
Wellsboro, PA
Pine Creek Challenge
Sep 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
Shenandoah, VA
Grindstone
Sep 20, 2024
Sep 21, 2024
North Bonneville, WA
Strawberry Fields Forever
Jun 22, 2024
Belleville, WI
Badger Trail Races
Aug 3, 2024
Aug 4, 2024
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
Waimea, HI
Under the Moon
Jun 22, 2024
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
Lakeshore, CA
China Peak Running Festival
Sep 7, 2024
Cat Spring, TX
Habanero Hundred
Aug 24, 2024
Natural Bridge, VA
Hellgate 100K
Dec 14, 2024
Booneville, IA
Booneville Backroads Ultra
Aug 31, 2024
Naples, NY
Twisted Branch Trail Run
Aug 24, 2024
Sky Valley, GA
Sky to Summit Trail Run
Oct 26, 2024
Hurricane, WV
Hurricane 100K
Sep 7, 2024
Logandale, NV
Fire Fest Ultra
Nov 23, 2024
Nov 24, 2024
Nov 22, 2024
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
Blacksburg, SC
Mountaineer Rumble
Nov 2, 2024
Forest City, IL
Temptation 200 Ultras
Aug 31, 2024
Sep 1, 2024
Apple Valley, UT
Zion Ultras
Apr 12, 2025
Apr 11, 2025
Silver Hill Meadow, VT
Vermont 100 Endurance Race
Jul 19, 2024
Hinckley, MN
Fire Tower Trail Races
Oct 5, 2024
Hyner Run State Park, PA
Black Forest Ultra 100K
Oct 6, 2024
Middlesex, NY
Great Hill Ultra
Jul 13, 2024
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| Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
| No | Race Date | Race | Location | Options |
|---|---|---|---|---|
| 41 |
Sep 28, 2024
Saturday
|
Hell Creek 100
140M, 100M, 100K, 20M trail run
More Information
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Sylvan Grove, KS
Lincoln County, KS
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| 42 |
Sep 28, 2024
Saturday
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Piney Woods Ultra
100K, 50K, 25K, 10K, 5K trail run
More Information
 |
Tyler, TX
Smith County, TX
|
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| 43 |
Sep 28, 2024
Saturday
|
Sangre de Cristo Ultras
100M, 100K, 50K trail run
More Information
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Westcliffe, CO
Custer County, CO
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| 44 |
Sep 29, 2024
Sunday
|
Dick Collins Firetrails
100K, 50M, 26.2M trail run
More Information
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Castro Valley, CA
Alameda County, CA
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| 45 |
Oct 5, 2024
Saturday
|
Fire Tower Trail Races
100K, 50K, 35K, 11K trail run
More Information
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Hinckley, MN
Pine County, MN
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| 46 |
Oct 6, 2024
Sunday
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Black Forest Ultra 100K
100K trail run
More Information
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Hyner Run State Park, PA
Clinton County, PA
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| 47 |
Oct 12, 2024
Saturday
|
Cloudsplitter 100
100M, 100K, 50K, 25K trail run | 100M relay
More Information
|
Norton, VA | |
| 48 |
Oct 12, 2024
Saturday
|
Heartland
100M, 100K, 50M, 26.2M, 13.1M trail run
More Information
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Cassoday, KS
Butler County, KS
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| 49 |
Oct 12, 2024
Saturday
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Indiana Trail 100
100M, 100K, 50M trail run
More Information
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Albion, IN
Noble County, IN
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| 50 |
Oct 12, 2024
Saturday
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Kodiak Ultra Marathons
100K, 50K, 21K trail run
More Information
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Big Bear Lake, CA
San Bernardino County, CA
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| 51 |
Oct 12, 2024
Saturday
|
Mo' Bell
24H, 100M, 75M, 12H, 100K, 50M, 50K, 26.2M, 13.1M, 10K, 5K, 1M run | 24H, 12H relay
More Information
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Burns, TN
Dickson County, TN
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| 52 |
Oct 12, 2024
Saturday
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Oil Creek 100 Trail Runs
100M, 100K, 50K, 25K trail run
More Information
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Titusville, PA
Crawford County, PA
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| 53 |
Oct 12, 2024
Saturday
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Tesla Hertz Run
100M, 100K, 50M, 50K, 10M trail run
More Information
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Rocky Point, NY
Suffolk County, NY
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| 54 |
Oct 18, 2024
Friday
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Mines of Spain 100
100M, 100K trail run
More Information
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Dubuque, IA
Dubuque County, IA
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| 55 |
Oct 19, 2024
Saturday
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Pumpkin Holler Hunnerd
100M, 100K, 50K, 25K, 10M trail run
More Information
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Tahlequah, OK
Cherokee County, OK
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| 56 |
Oct 19, 2024
Saturday
|
UnitedAF Ultramarathon
100M, 100K, 50M, 50K run | 100M relay
More Information
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Lima, OH
Allen County, OH
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| 57 |
Oct 19, 2024
Saturday
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Wild Duluth Races - Wild Duluth 100K/50K, Harder 'n Heck Half & Terribly Tough 10K
100K, 50K trail run
More Information
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Duluth, MN
St Louis County, MN
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| 58 |
Oct 26, 2024
Saturday
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Canyonlands Ultra
100K, 50M, 50K, 26.2M, 13.1M, 15K trail run
More Information
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Moab, UT
Grand County, UT
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| 59 |
Oct 26, 2024
Saturday
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Javelina Jundred
100M, 100K, 31K trail run
More Information
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Fountain Hills, AZ
Maricopa County, AZ
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| 60 |
Oct 26, 2024
Saturday
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Kansas Rails-to-Trails Extravaganza
100M, 100K, 50M, 50K, 26.2M, 13.1M trail run
More Information
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Ottawa, KS
Franklin County, KS
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City Location
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.