October Ultras in the USA
Greensboro, NC
Triple Lakes Trail Race
Oct 30, 2021
Sausalito, CA
Marine Mammal Ultra
Oct 19, 2019
Titusville, NJ
Trails4Tails Fest
Oct 16, 2021
Perryville, AR
Arkansas Traveller 100
Oct 2, 2021
Dallas, TX
Red River Relay
Oct 23, 2021
Holland, MI
Ultra Bird Trail Races
Oct 23, 2021
Greenbush, WI
Glacial Trail 50 Mile & 50K
Oct 10, 2021
Kennesaw, GA
General 100
Oct 16, 2021
Sterling, IL
Hennepin Hundred
Oct 2, 2021
Sacramento, CA
No'to'mom Endurance Runs
Oct 2, 2021
Flagstaff, AZ
Flagstaff Sky Peaks Mountain Runs
Oct 2, 2021
Fountain Hills, AZ
Javelina Jundred
Oct 30, 2021
Cedar City, UT
Cedar City Thunderbird 50K
Oct 17, 2020
Newcastle, WA
Cougar Mountain Trail Running Series
May 8, 2021
Jun 12, 2021
Jul 10, 2021
Aug 14, 2021
1 more
Deerfield Beach, FL
PALM100 Ultras
Oct 26, 2019
Waynesville, OH
Broken Toe 50K
Oct 16, 2021
Douglas, MA
Midstate Massive Ultra Trail
Oct 9, 2021
Morristown, TN
Dirt Circuit
Oct 23, 2021
Solon, IA
Hawkeye 50K & 25K
Oct 30, 2021
Franklin, NC
Naturalist - Epic 50K, 25K
Oct 2, 2021
Bend, OR
HTC High Desert
Oct 2, 2021
Dayton, OH
OX 12 Hour Endurance Run
Oct 2, 2021
Boalsburg, PA
Tussey Mountainback 50 Mile Relay and Ultra
Oct 31, 2021
Nashville, TN
Nashville Ultra Marathon
Oct 30, 2021
Duluth, MN
Wild Duluth Races
Oct 16, 2021
Columbus, GA
Columbus Day Relay
Oct 9, 2021
Denison, TX
Red River Relay
Oct 23, 2021
Crested Butte, CO
Crested Butte Ultra
Oct 2, 2021
Kings Park, NY
Fred von der Heydt Memorial 6 Hour Birthday Run
Oct 17, 2021
Dubuque, IA
Mines of Spain 100
Oct 15, 2021
Naples, FL
Gulf to Gulf 80 Mile Relay
Oct 17, 2020
Newport, OR
Dia De Los Muertos Endurance Run
Oct 30, 2021
Colorado Springs, CO
Bear Creek Endurance Run
Oct 2, 2021
Bobcat Trail Races
Oct 23, 2021
Fox Run Endurance Run
Oct 23, 2021
East Peoria, IL
Farmdale Trail Run
Oct 9, 2021
Woodinville, WA
Baker Lake 50K
Oct 2, 2021
Ardmore, OK
Lake Murray Endurance Run
Oct 23, 2021
San Jose, CA
Quicksilver Endurance Runs
Oct 23, 2021
Raleigh, NC
Tuna Relay 200
Oct 22, 2021
Canton, GA
Sleepy Hollow Hourly Ultra
Oct 10, 2020
Rocky Point, NY
Tesla Hertz Run
Oct 9, 2021
Charlotte, NC
WC-50 Ultra Trail Marathon
Oct 9, 2021
Time Laps
Oct 22, 2021
Emporium, PA
Sinnemahone Trail Run
Oct 16, 2021
Lake Charles, LA
Danimal 50K
Oct 19, 2019
Minneapolis, MN
Loopet Loppet
Oct 10, 2021
South Lake Tahoe, CA
Lake Tahoe Marathon Weekend
Oct 10, 2021
Oct 8, 2021
Oct 9, 2021
Fayetteville, AR
Fayetteville Spartan Trail US Championship
Oct 30, 2021
Oct 31, 2021
Guilford, CT
Bimblers Bluff 50K
Oct 24, 2021
Calabasas, CA
Bulldog Trail Runs
Oct 2, 2021
Baywood-Los Osos, CA
Spooner's Cove
Oct 16, 2021
Oct 17, 2021
Bloomington, IN
Tecumseh Trail Marathon
Oct 23, 2021
Reading, PA
Blues Cruise 50K Trail Ultra
Oct 3, 2021
Canandaigua, NY
Can Lake 50 Ultras
Oct 9, 2021
Ft. Mill, SC
Ragnar Trail Carolinas
Oct 24, 2020
Quincy, IL
1 MPH Marathon
Oct 8, 2021
Tacoma, WA
Defiance 50K
Oct 10, 2020
South Bend, IN
St Pats 24 Hour
Oct 19, 2019
Cincinnati, OH
Stone Steps 50K
Oct 24, 2021
Comfort, TX
Ragnar Trail Hill Country
Oct 15, 2021
Plymouth, MA
Long, Hard & Dirty Ultra
Oct 10, 2020
Chattanooga, TN
Rock/Creek Stump Jump Trail Race
Oct 2, 2021
Woodside, CA
Woodside Trail Run
Oct 31, 2020
Amherst, NH
Joe English Twilight Challenge
Oct 23, 2021
Adrian, MI
Heritage Trail Run
Oct 24, 2021
New London, WI
Mosquito Hill Endurance Run
Oct 16, 2021
Chapel Hill, NC
Jordan Lake 12-Hour Challenge
Oct 3, 2020
Brooksville, FL
John Holmes Trail Run
Oct 9, 2021
Memphis, TN
Big Buffalo 50
Oct 23, 2021
Wildwood, MO
DeClue Loops Trail Race
Oct 16, 2021
La Crosse, WI
Hixon Trail Runs
Oct 30, 2021
Oct 31, 2021
Holly, MI
Gravel Time
Oct 17, 2021
North Augusta, SC
FATS 50K
Oct 3, 2021
Spokane, WA
Chocolate Chip Cookie 50K Trail Run
Oct 26, 2019
Wilsonville, OR
ORRC Autumn Leaves Run
Oct 30, 2021
Pinckney, MI
Trail Marathon
Oct 23, 2021
Corona, CA
Twin Peaks 50
Oct 17, 2020
San Francisco, CA
Ruth Anderson Memorial Endurance Run
Oct 9, 2021
Pinkathon Challenge for Breast Cancer
Oct 23, 2021
Black River Falls, WI
Black River Trail Classic
Oct 23, 2021
Arlington, VA
Marine Corps Marathon
Oct 31, 2021
Maidens, VA
Camp Hilbert Race Series Fall 2
Oct 10, 2021
Omaha, NE
G.O.A.T.z Trail Runs
Oct 17, 2021
Oakridge, OR
Willamette Headwaters Endurance Event
Oct 3, 2020
Oklahoma City, OK
24 The Hard Way Run
Oct 16, 2021
Draper Immortal
Oct 24, 2021
Clifton, VA
Bull Run Run 50 Mile
Oct 2, 2021
Cumberland, RI
Survival of the F.I.T.test 24 Hour Trail Ultra
Oct 23, 2021
Columbia, MO
Rock Bridge Revenge
Oct 2, 2021
Albion, IN
Indiana Trail 100
Oct 9, 2021
San Antonio, TX
El Taco Loco
Oct 23, 2021
Newport News, VA
Noland Trail 50K
Oct 17, 2021
Reidsville, NC
Lost Runners 24
Oct 17, 2020
San Diego, CA
Lake Hodges Trail Fest
Oct 23, 2021
Windham, NY
Catskills P2B Relay
Oct 16, 2022
Cassoday, KS
Heartland
Oct 9, 2021
Oct 8, 2021
Sturgeon Bay, WI
Fall 50 - Door County
Oct 23, 2021
Chicago, IL
Chicago Lakefront 50K/50M
Oct 30, 2021
Belmont, OH
Barkcamp Race
Oct 2, 2021
Presque Isle, PA
Personal Endurance Classic
Oct 17, 2020
Greenville, SC
Swamp Rabbit Urban Ultra 50K
Oct 3, 2020
Millburn, NJ
Mayapple Trail Run
Oct 16, 2021
Lexington, KY
Bourbon Chase
Oct 15, 2021
Brainard, NE
Bohemian Alps 50K
Oct 9, 2021
Des Moines, IA
Equalizer Endurance Run
Oct 30, 2021
Mountainside, NJ
Squatchung Surprise
Oct 2, 2021
New Gloucester, ME
Royal River Relay
Oct 17, 2020
Brooklyn, NY
NYCRUNS Prospect Park Marathon
Oct 16, 2021
Kalamazoo, MI
Kal-Haven Trail Run
Oct 30, 2021
Saratoga, CA
Skyline to the Sea
Oct 3, 2020
Oct 4, 2020
Wausau, WI
IRONBULL Ultra Trail 50K/15K
Oct 2, 2021
Baltimore, MD
Patapsco Valley 50K
Oct 30, 2021
Gills Rock, WI
Fall 50 - Door County
Oct 23, 2021
Titusville, PA
Oil Creek 100 Trail Runs
Oct 16, 2021
Vernon Hills, IL
Des Plaines River Trail Races
Oct 17, 2021
Council Bluffs, IA
Yippee-Ki-Yay 50K
Oct 23, 2021
Simi Valley, CA
Rocky Peak Ultra Trail Race
Oct 9, 2021
Trinidad, CO
Rad Dirt Fest
Oct 3, 2021
Whitefish, MT
Whitefish Trail Legacy Run
Oct 3, 2021
Oct 2, 2021
Wolf Creek, MT
Wolf Creek Canyon Relay
Oct 3, 2021
Tahlequah, OK
Pumpkin Holler Hunnerd
Oct 16, 2021
Gunnison, CO
Sage Burner Trail Run
Oct 16, 2021
Circleville, WV
West Virginia Trilogy
Oct 8, 2021
Oct 9, 2021
Oct 10, 2021
Steelville, MO
Ozark Trail 100 Mile Endurance Run
Oct 30, 2021
Augusta, NJ
NJ Trail Series One Day
Oct 7, 2021
Oct 8, 2021
Granbury, TX
Dallas Spartan Trail
Oct 24, 2021
Blue Ridge, GA
Blue Ridge Ultra
Oct 9, 2021
Cannon Beach, OR
Gorgeous Coast Relay
Oct 3, 2021
Hood River, OR
Gorgeous Hood to Hood Relay
Oct 17, 2021
Faust, UT
Pony Express Trail 100
Oct 15, 2021
Laurel, DE
Trap Pond 50K
Oct 4, 2020
Savage, MN
Surf The Murph
Oct 23, 2021
Pilot Mountain, NC
Pilot Mountain to Hanging Rock Trail Ultras
Oct 2, 2021
Kaysville, UT
DC Peaks 50
Oct 9, 2021
Hermitage, TN
Long Hunter Trail Runs
Oct 9, 2021
Powhatan, VA
Piedmont 8 Hour
Oct 23, 2021
Brunswick, MD
River's Edge Endurance Challenge
Oct 23, 2021
Ringgold, GA
General 100
Oct 16, 2021
Burns, TN
Mo' Bell
Oct 9, 2021
Oct 10, 2021
East Memphis, TN
Haiti Medical Missions 24 Hour Tour d'Esprit
Oct 11, 2019
Port St Joe, FL
50 For Florida
Oct 23, 2021
Flowood, MS
Cemetery Hill 50K 10M
Oct 2, 2021
Palm Coast, FL
Jacks Trail Race
Oct 24, 2021
Alabaster, AL
Endless Mile
Oct 16, 2020
Oct 17, 2020
Wellsboro, PA
Green Monster Trail Challenge
Oct 10, 2021
Richfield, OH
Crowell Hilaka Trail Run
Oct 17, 2021
Canton, MS
Way's Bluff
Oct 10, 2020
Clermont, KY
Bourbon Chase
Oct 15, 2021
Ashford, CT
NipMuck Trail Marathon
Oct 3, 2021
Alpine, TX
Trans-Pecos Ultra
Oct 17, 2021
Middleville, MI
Yankee Springs Fall Festival
Oct 2, 2021
Tillamook, OR
Elk-Kings Trail Races
Oct 2, 2021
Alachua, FL
Gate2Gate Trail Run
Oct 24, 2020
Garrison, NY
Castle to River Run
Oct 24, 2020
Los Olivos, CA
Back on the Ranch
Oct 2, 2021
Tijeras, NM
Cedro Peak
Oct 16, 2021
Amherst, NY
Buffalo Runners 6 Hour Classic
Oct 11, 2020
Meriden, KS
Lake Perry Rocks
Oct 5, 2019
Pisgah Forest, NC
Pisgah 55.5K Running Race
Oct 23, 2021
Gold Beach, OR
Secret Beach 100K/50M
Oct 2, 2021
Oct 3, 2021
Moncks Corner, SC
Revenge of the Stede Bonnet
Oct 2, 2021
Farmersville, TX
Oktoberfest Trail Run Festival
Oct 16, 2021
Bald Head Island, NC
Badwater Cape Fear
Oct 2, 2021
Lillington, NC
Cape Fear 24H Endurance Run
Oct 9, 2021
Palo Duro Canyon State Park, TX
Palo Duro Trail Run
Oct 23, 2021
Kansasville, WI
Wolf Pack Trail Run & Relay
Oct 9, 2021
Borden, IN
Knobstone Knockout
Oct 11, 2020
Sebastopol, CA
Gravenstein 8 Hour
Oct 30, 2021
Dugway, UT
Dugway Trail and Ultra Run
Oct 2, 2021
Mokuleia, HI
Peacock Challenge
Oct 17, 2020
Kyburz, CA
Lover's Leap of Faith
Oct 2, 2021
Mayfield, OH
Conquer the Castle
Oct 2, 2021
Jamestown, TN
No Business 100
Oct 1, 2021
Cornwall, CT
Mohawk Mountain Race
Oct 16, 2021
Sedalia, CO
Indian Creek Fifties
Oct 16, 2021
Norton, VA
Cloudsplitter 100
Oct 16, 2021
Yachats, OR
Oregon Coast
Oct 10, 2021
Oct 9, 2021
La Crosse, VA
Thoroughbred Races
Oct 2, 2021
Hewitt, NJ
Ragnar Trail Wawayanda Lake
Oct 2, 2021
Forest, VA
Empower Off Road Challenge
Oct 23, 2021
Peosta, IA
Swiss Valley Trail Races
Oct 2, 2021
Polebridge, MT
Le Grizz Ultramarathon
Oct 9, 2021
Julian, CA
Oriflamme 50K
Oct 16, 2021
Hanalei, HI
EPIC5 Ultra Run Challenge
Oct 22, 2021
Arrington, VA
Virginia Spartan Trail
Oct 31, 2021
Pocahontas, TN
Walking Tall 50K/25K
Oct 16, 2021
Mont Clare, PA
Schuylkill River Relay
Oct 30, 2021
Mill Spring, NC
Wine & Dine 3 - 6 - 9 Hour Ultra
Oct 23, 2021
Pamplin, VA
High Bridge Ultra 50K
Oct 9, 2021
Waterville, PA
Wilds Mountain Fest
Oct 24, 2021
Colden, NY
Tamarack Big Beast
Oct 24, 2020
Grapeland, TX
Mission Tejas Trail Run
Oct 9, 2021
Canton, SD
Glacier Hills Ultra
Oct 23, 2021
Tonalea, AZ
Naatsisaan Trail Ultra
Oct 31, 2020
Mammoth Cave, KY
Mammoth Cave 50K 25K
Oct 23, 2021
Upper Black Eddy, PA
Muleskinner
Oct 16, 2021
Pacific Beach, WA
Seabrook Relay
Oct 16, 2021
La Sal, UT
UTE 100
Oct 2, 2021
North Bend, PA
Black Forest Ultra 100K
Oct 3, 2021
Vesuvius, VA
Monte Vino Races - 12 Ridges Vineyard
Oct 23, 2021
Westfir, OR
Westfir 50k
Oct 24, 2021
La Honda, CA
Vista Verde Skyline Run
Oct 23, 2021
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| Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
City Location
1. No Business 100
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Oct 1, 2021Friday
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100M trail run
More Information
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Jamestown, TN
Fentress County, TN
2. Sawtooth Women's Trail Running Weekend
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Oct 1, 2021Friday
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30M, 15M trail run
More Information
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Women Only
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Carlton, WA
Okanogan County, WA
3. Arkansas Traveller 100
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Oct 2, 2021Saturday
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100M trail run
More Information
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Perryville, AR
Perry County, AR
4. Back on the Ranch
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Oct 2, 2021Saturday
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24H, 12H, 6H run
More Information
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Los Olivos, CA
Santa Barbara County, CA
5. Badwater Cape Fear
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Oct 2, 2021Saturday
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50M, 50K run
More Information
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Bald Head Island, NC
Brunswick County, NC
6. Baker Lake 50K
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Oct 2, 2021Saturday
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50K trail run
More Information
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Woodinville, WA
King County, WA
7. Barkcamp Race
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Oct 2, 2021Saturday
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13.1M, 10K, 5K run | 40M, 26.2M, 13.1M trail run
More Information
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Belmont, OH
Belmont County, OH
8. Bear Creek Endurance Run
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Oct 2, 2021Saturday
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12H trail run
More Information
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Colorado Springs, CO
El Paso County, CO
9. Bull Run Run 50 Mile
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Oct 2, 2021Saturday
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50M run
More Information
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Clifton, VA
Fairfax County, VA
10. Bulldog Trail Runs
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Oct 2, 2021Saturday
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50K, 25K trail run
More Information
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Calabasas, CA
Los Angeles County, CA
11. Cemetery Hill 50K 10M
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Oct 2, 2021Saturday
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50K, 10M run
More Information
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Flowood, MS
Rankin County, MS
12. Conquer the Castle
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Oct 2, 2021Saturday
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100K, 50K, 20M, 10M, 5K run
More Information
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Mayfield, OH
Cuyahoga County, OH
13. Crested Butte Ultra
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Oct 2, 2021Saturday
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105K, 55K trail run
More Information
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Crested Butte, CO
Gunnison County, CO
14. Dugway Trail and Ultra Run
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Oct 2, 2021Saturday
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50K, 30K, 13.1M, 10K, 5K trail run | kids run
More Information
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Dugway, UT
Tooele County, UT
15. Elk-Kings Trail Races
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Oct 2, 2021Saturday
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50K, 27.5M, 25K trail run
More Information
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Tillamook, OR
Tillamook County, OR
16. Flagstaff Sky Peaks Mountain Runs
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Oct 2, 2021Saturday
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50M, 50K, 27K, 10K trail run
More Information
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Flagstaff, AZ
Coconino County, AZ
17. Hennepin Hundred
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Oct 2, 2021Saturday
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100M, 50M, 50K trail run
More Information
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Sterling, IL
Whiteside County, IL
18. HTC High Desert
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Oct 2, 2021Saturday
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71M relay
More Information
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Bend, OR
Deschutes County, OR
19. IRONBULL Ultra Trail 50K/15K
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Oct 2, 2021Saturday
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50K, 15K trail run
More Information
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Wausau, WI
Marathon County, WI
20. Lover's Leap of Faith
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Oct 2, 2021Saturday
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50K, 26.2M, 18M, 13.1M, 9M, 10K, 5K, 2M trail run
More Information
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Kyburz, CA
El Dorado 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.