May Ultras in the USA
Blacksburg, VA
Gateway 50K & 25K
May 2, 2020
Sausalito, CA
San Francisco 50 Miler
May 16, 2020
Nashville, IN
Dances With Dirt - Gnaw Bone, IN
May 22, 2021
Portland, OR
Stumptown Trail Runs
May 31, 2021
May 29, 2021
Potosi, MO
Berryman Marathon & 50 Miler
May 15, 2021
Dallas, TX
RunOrDrop 50K/30K
May 18, 2019
Oak Ridge, TN
Run Under The Stars
May 15, 2021
Locust Grove, GA
Sunshine Endurance 6 and 12H Run
May 7, 2021
Flagstaff, AZ
Cocodona 250
May 3, 2021
Fountain Hills, AZ
Adrenaline Night Runs
May 22, 2021
Bainbridge Island, WA
Battle Point Endurance Run
May 2, 2020
Fremont, CA
Ohlone 50K Trail Run
May 15, 2022
Bellingham, WA
Lost Lake 50K
May 2, 2020
Ski to Sea
May 30, 2021
Plainview, NY
Greenbelt Trail 50K
May 8, 2021
Bastrop, TX
Wildflower Trail Runs
May 8, 2021
May 9, 2021
Pawling, NY
Summer Warm Up Run
May 2, 2021
Rochester, NY
Mind The Ducks 12 Hour
May 8, 2021
Athens, OH
Thunderbunny 50K
May 8, 2021
May 7, 2021
Ft. Valley, VA
Massanutten Mountain Trails 100 Mile Run
May 14, 2022
Berkeley, CA
Grizzly Peak
May 8, 2021
Colorado Springs, CO
Cheyenne Mountain Ultra 10x5K
May 2, 2020
Fairmont, WV
EHQ Valley Falls 6 & 12 Hour
May 1, 2021
Greenland, CO
Greenland Trail Races
May 8, 2021
San Jose, CA
Quicksilver Endurance Runs
May 8, 2021
Philadelphia, PA
Dirty German Endurance Fest
May 8, 2021
Issaquah, WA
Tiger Mountain Trail Run
May 15, 2021
Park City, UT
Running with Ed
May 22, 2021
Guntersville, AL
Sweet Southern Discomfort - Alabama
May 25, 2020
Stinson Beach, CA
Miwok 100K
May 7, 2022
Apr 23, 2021
May 2, 2021
Pacifica, CA
Devils Slide Trail Run
May 22, 2021
Folsom, CA
American River 50 Mile Endurance Run
May 8, 2021
Folsom South Side Trail Run
May 15, 2021
Buena Vista, CO
Collegiate Peaks Trail Run
May 1, 2021
Los Gatos, CA
Big Basin - Skyline to the Sea
May 31, 2020
Charlottesville, VA
UROC 100K, Uber Rock 50K & Cruxy 25K
May 1, 2021
Willoughby Hills, OH
CLE Trail Challenge
May 11, 2019
Laramie, WY
Wyoming Marathon Races
May 30, 2021
Key West, FL
KEYS100
May 15, 2021
Madison, WI
Ragnar Great Midwest
May 15, 2020
Waukegan, IL
Ragnar Great Midwest
May 15, 2020
Huntington, WV
Salamander State Marathon
May 31, 2021
Columbia, SC
Firebreak Ultra and FKT Challenge
May 15, 2021
Bishop, CA
Bishop High Sierra Ultras
May 22, 2021
Dousman, WI
Bunk House Trail Runs
May 29, 2021
Holly, MI
Ode to the Night
May 15, 2021
Fabius, NY
Highland Forest 1-2-3 Trail Run
May 30, 2020
Cleveland Heights, OH
The Forgotten
May 30, 2020
Winthrop, WA
Sun Mountain
May 22, 2021
May 23, 2021
Thurmond, WV
Highball to Thurmond Ultra
May 22, 2022
Galena, IL
Galena Sky Trail Race
May 15, 2021
Jackson, MI
Cascades 1 x 100M Challenge
May 1, 2021
Paso Robles, CA
Silver Moon Race
May 29, 2021
Kirtland, OH
Outrun 24 Hour Trail Race
May 8, 2021
Fall River, MA
Watuppa Trail Races
May 17, 2020
Corvallis, OR
McDonald Forest 50K Trail Run
May 8, 2021
Charleston, WV
Middle Ridge Monster 8H Run
May 8, 2021
Maidens, VA
Camp Hilbert Race Series Spring 2
May 16, 2021
Port Angeles, WA
Frosty Moss Relay
May 15, 2021
Lone Pine, CA
Wild Wild West Marathon
May 1, 2021
Delaware, OH
Playin' Possum 50K
May 23, 2020
Clayton, CA
Mt Diablo Trail Run
May 16, 2020
Guerneville, CA
Armstrong Redwoods Trail Run
May 1, 2021
Brandenburg, KY
Ragnar Trail Kentuckiana
May 21, 2021
Palo Alto, CA
Horseshoe Lake
May 2, 2021
Apr 1, 2021
May 31, 2021
Chelsea, MI
Island Time
May 7, 2021
May 8, 2021
San Diego, CA
PCT 50
May 22, 2021
Los Alamos, NM
Jemez Mountain Trail Runs
May 22, 2021
Millburn, NJ
Mayapple Trail Run
May 16, 2020
Des Moines, IA
Market to Market Relay - Iowa
May 14, 2022
Wartrace, TN
Strolling Jim Run
May 1, 2021
Ludington, MI
Veterans Memorial 150
May 29, 2021
New Gloucester, ME
Trail Festival at Pineland Farms
May 29, 2021
May 30, 2021
Ithaca, NY
Cayuga Trails 50
May 29, 2021
Morgantown, WV
Downhill Dirt 50K
May 8, 2021
Trabuco Canyon, CA
Baldy Marathons
May 9, 2020
Faribault, MN
Maple Syrup Fun Run
May 2, 2020
May 1, 2021
Pelham, AL
Run for Kids Challenge
May 1, 2021
Yellow Springs, OH
Tie Dye 50K
May 9, 2020
Terrebonne, OR
Smith Rock Ascent
May 15, 2021
May 16, 2021
Portersville, PA
Glacier Ridge Trail Ultra
May 15, 2021
North Berwick, ME
Balata Capacity Relay
May 4, 2019
Graford, TX
Possums Revenge
May 22, 2021
Pine, AZ
Pine Trail Run
May 7, 2022
Blue Ridge, GA
Cruel Jewel 100
May 14, 2021
Cruel Jewel 50
May 15, 2021
Dover, OH
Running With My Gnomies
May 15, 2021
Susanville, CA
Paiute Meadows Trail Run
May 8, 2021
Boiling Springs, PA
Bubbletown What The Duck Ultra
May 29, 2021
Ashburnham, MA
Wapack and Back Trail Races
May 9, 2020
Calhoun, GA
Sweet Southern Discomfort - Georgia
May 23, 2020
Reedley, CA
Silver Moon Race
May 29, 2021
West Fork, AR
RAPTOR Adventure Series
May 1, 2021
Waxahachie, TX
Hachie 50
May 1, 2021
Hixson, TN
Locomotion Endurance 6/12/24
May 8, 2021
Wellsboro, PA
Hills Creek Endurance Challenge
May 8, 2021
Richfield, OH
HIgh Lea 6/12/24
May 22, 2021
East Ridge, TN
Sweet Southern Discomfort - Tennessee
May 24, 2020
Seaside, OR
100K Relay on the Prom
May 14, 2021
Rush City, MN
Growing Green Challenge
May 29, 2021
May 30, 2021
Kanab, UT
Grand to Grand Ultra
May 16, 2021
Burnsville, NC
Quest For The Crest Trail Races
May 15, 2021
Eldridge, IA
Corn Belt Running Club 24 Hour Run
May 15, 2021
Cordesville, SC
Wambaw Swamp Stomp
May 1, 2021
Black Canyon City, AZ
Cocodona 250
May 3, 2021
Prineville, OR
Ochoco Trail Runs
May 24, 2020
Trail, OR
Lost Creek Trail Runs
May 2, 2020
Bigfork, MT
Spartan Trail - Montana
May 1, 2021
Franktown, CO
Castlewood Canyon Endurance Run
May 22, 2021
Pittsburg, TX
East Texas Ultra
May 22, 2021
Penfield, PA
Quehanna 50
May 2, 2020
Mt. Carmel, UT
Ragnar Trail Relay - Zion
May 14, 2021
Jefferson, IA
Market to Market Relay - Iowa
May 14, 2022
Rochelle Park, NJ
Saddle Up Spring Challenge
May 8, 2021
Blodgett, OR
Marys Peak Trail Run
May 15, 2021
Sharon Hill, PA
Dawn to Dusk to Dawn Ultras
May 9, 2020
May 7, 2021
May 10, 2021
Lolo, MT
Hootenanny 50K
May 23, 2021
Rockwood, TN
Ozone Endurance Challenge
May 26, 2021
Cloudcroft, NM
Cloudcroft Ultra Trail Race
May 16, 2020
Quanah, TX
Chupacabra 50k
May 8, 2021
Stearns, KY
Yamacraw Trail Runs
May 22, 2021
May 23, 2021
La Crosse, VA
Thoroughbred Races
May 9, 2020
Mouth of Wilson, VA
Grayson Highlands
May 2, 2021
May 1, 2021
Pawhuska, OK
Flower Moon
May 15, 2021
Miami, AZ
Pinal Peak
May 29, 2021
Divide, CO
Endure 12 and 24 Hour
May 15, 2021
Strawn, TX
Hidden Hills Ultra
May 15, 2021
Rixeyville, VA
5 Hours of Verdun Cross Country Relay Race
May 8, 2021
Fort Collins, CO
Quad Rock 50
May 8, 2021
Fort Mill, SC
4 X 4 X 48 Challenge
May 7, 2021
Elkhart, KS
Okie Relays
May 16, 2020
Globe, AZ
Pinal Peak
May 29, 2021
Gold Bar, WA
Wallace Falls Trail Run
May 22, 2021
May 23, 2021
Proctorville, OH
Bobcat Marathon
May 30, 2021
Chesterfield, MA
Chesterfield Gorge Ultra and 25K Race
May 30, 2020
May 31, 2020
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| Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
City Location
1. Armstrong Redwoods Trail Run
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CancelledMay 1, 2021Saturday
-
50K, 30K, 17K, 9K, 5K trail run
More Information
-
Guerneville, CA
Sonoma County, CA
2. Cascades 1 x 100M Challenge
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Past DateMay 1, 2021Saturday
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100M, 1M run
More Information
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Jackson, MI
Jackson County, MI
3. Collegiate Peaks Trail Run
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Past DateMay 1, 2021Saturday
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50M, 25M trail run
More Information
-
Buena Vista, CO
Chaffee County, CO
4. EHQ Valley Falls 6 & 12 Hour
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Past DateMay 1, 2021Saturday
-
12H, 6H trail run
More Information
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Fairmont, WV
Marion County, WV
5. Hachie 50
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Past DateMay 1, 2021Saturday
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50M, 50K, 26.2M run | 50M relay | kids run
More Information
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Boston Marathon Qualifier
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Waxahachie, TX
Ellis County, TX
6. RAPTOR Adventure Series
-
Past DateMay 1, 2021Saturday
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50K, 25K, 10K trail run
More Information
-
West Fork, AR
Washington County, AR
7. Run for Kids Challenge
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Past DateMay 1, 2021Saturday
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12H, 50K, 10K trail run
More Information
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Pelham, AL
Shelby County, AL
8. Spartan Trail - Montana
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Past DateMay 1, 2021Saturday
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50K, 21K, 10K trail run
More Information
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Bigfork, MT
Flathead County, MT
9. Strolling Jim Run
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Past DateMay 1, 2021Saturday
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41.2M, 26.2M, 13.1M, 10K run
More Information
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Boston Marathon Qualifier
-
Wartrace, TN
Bedford County, TN
10. Tillamook Burn Trail Run - 50M
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Past DateMay 1, 2021Saturday
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50M trail run
More Information
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Timber, OR
Washington County, OR
11. UROC 100K, Uber Rock 50K & Cruxy 25K
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Past DateMay 1, 2021Saturday
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100K, 50K, 25K trail run
More Information
- Charlottesville, VA
12. Wambaw Swamp Stomp
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Past DateMay 1, 2021Saturday
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50M, 50K trail run | 50M, 50K relay
More Information
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Cordesville, SC
Berkeley County, SC
13. Wild Wild West Marathon
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Past DateMay 1, 2021Saturday
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50M, 50K, 26.2M, 10M trail run
Virtual OptionMore Information
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Lone Pine, CA
Inyo County, CA
14. Battle Point Endurance Run
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CancelledMay 2, 2020Saturday
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12H, 10H, 8H, 6H, 4H, 2H run
More Information
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Bainbridge Island, WA
Kitsap County, WA
15. Cheyenne Mountain Ultra 10x5K
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CancelledMay 2, 2020Saturday
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50K, 5K run | 50K, 5K trail run | 50K relay
More Information
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Colorado Springs, CO
El Paso County, CO
16. Fall Creek Falls 50K & Half Marathon Trail Runs
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Past DateMay 2, 2021Sunday
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50K, 13.1M trail run
Virtual OptionMore Information
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Spencer, TN
Van Buren County, TN
17. Gateway 50K & 25K
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CancelledMay 2, 2020Saturday
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50K, 25K trail run
More Information
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Blacksburg, VA
Montgomery County, VA
18. Grayson Highlands
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Past DateMay 2, 2021Sunday
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50K trail run
More Information
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Mouth of Wilson, VA
Grayson County, VA
19. Horseshoe Lake
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Past DateMay 2, 2021Sunday
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50K, 26.2M, 13.1M, 5M trail run
More InformationVirtual for 2021
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Palo Alto, CA
Santa Clara County, CA
20. Lost Creek Trail Runs
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CancelledMay 2, 2020Saturday
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50K, 30K, 5K trail run | 30K relay
More Information
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Trail, OR
Jackson County, OR
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.