May Ultras in the USA
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Bear Mountain, NY
North Face Endurance Challenge
May 5, 2018
Sausalito, CA
San Francisco 50 Miler
May 19, 2018
Nashville, IN
Dances With Dirt - Gnaw Bone, IN
May 19, 2018
Portland, OR
Stumptown Trail Runs (formerly Trail Factor Half Marathon)
May 26, 2018
Stumptown Trail Runs
May 28, 2018
Oak Ridge, TN
Run Under The Stars 3 All Night Runs
May 19, 2018
Fountain Hills, AZ
Adrenaline Night Runs
May 19, 2018
Fremont, CA
Ohlone 50K Trail Run
May 20, 2018
Sammamish, WA
Soaring Eagle Trail Run
May 26, 2018
Bellingham, WA
Lost Lake 50K
May 12, 2018
Ski to Sea
May 27, 2018
Plainview, NY
Greenbelt Trail 50K
May 12, 2018
Bastrop, TX
Wildflower Trail Runs
May 11, 2019
Rochester, NY
Mind The Ducks 12 Hour
May 11, 2019
Eureka Springs, AR
Outback in the Ozark - Pure Trail Edition
May 4, 2018
New Paltz, NY
Rock The Ridge
May 4, 2019
Athens, OH
Thunderbunny 50K
May 12, 2018
Ft. Valley, VA
Massanutten Mountain Trails 100 Mile Run
May 19, 2018
Greenland, CO
Greenland Trail Races
May 4, 2019
York, ME
Big A 50K
May 5, 2018
San Jose, CA
Quicksilver 100K and 50K
May 12, 2018
Philadelphia, PA
Dirty German Endurance Fest
May 12, 2018
Terre Haute, IN
Hawthorn Half Day Relay & Ultra
May 18, 2019
Charlotte, NC
Time Laps 24 Hour Relay Race
May 17, 2019
Spencerport, NY
12 Hour Trail Relay & Solo Race
May 26, 2018
Park City, UT
Running with Ed
May 18, 2019
Guntersville, AL
Sweet Southern Discomfort - Alabama
May 27, 2019
Seattle, WA
Sri Chinmoy 7 & 13 Hour
May 19, 2018
Stinson Beach, CA
Miwok 100K
May 4, 2019
Henderson, NV
Calico Centennial Celebration
May 26, 2018
Springfield, MO
Ozark 50 Fit Challenge
May 5, 2018
Buena Vista, CO
Collegiate Peaks Trail Run
May 5, 2018
Charlottesville, VA
UROC 100K, Uber Rock 50K & Cruxy 25K
May 11, 2019
Willoughby Hills, OH
CLE Trail Marathon
May 12, 2018
Plymouth, MA
Ragnar Cape Cod Relay
May 11, 2018
Laramie, WY
Wyoming Marathon Races
May 26, 2019
Key West, FL
KEYS100
May 18, 2019
Kennebunk, ME
Shipyard Maine Coast Marathon
May 11, 2019
Topsfield, MA
Mother's Day Six Hour Walk/Run
May 13, 2018
Dousman, WI
Bunk House Trail Runs
May 25, 2019
Reno, NV
Silver State 50-mile and 50K Endurance Runs
May 19, 2018
Reno-Tahoe Odyssey Relay Run Adventure
May 31, 2019
Appleton, WI
Apple Creek 50K
May 12, 2018
Winthrop, WA
Sun Mountain 50K
May 19, 2018
Galena, IL
Galena Sky Trail Races
May 18, 2019
San Francisco, CA
Golden Gate Relay - California's Longest Party
May 5, 2018
Maryville, TN
Ozone Endurance Challenge
May 29, 2019
Kirtland, OH
Outrun 24 Hour Trail Race
May 4, 2019
Corvallis, OR
McDonald Forest 50K Trail Run
May 12, 2018
Lone Pine, CA
Wild Wild West Marathon & Ultras
May 4, 2019
La Grange, WI
Ice Age Trail Run
May 11, 2019
Delaware, OH
Playin' Possum 50K
May 19, 2018
Pollock Pines, CA
Trail Run at Sly Park Lake
May 12, 2018
Clayton, CA
Mt Diablo Trail Run
May 19, 2018
San Antonio, TX
I Ran Marathons - Memorial Heroes Navy
May 26, 2018
Guerneville, CA
Armstrong Redwoods Trail Run
May 5, 2018
Brandenburg, KY
Ragnar Trail Kentuckiana
May 11, 2018
Calistoga, CA
Golden Gate Relay
May 4, 2019
Palo Alto, CA
Horseshoe Lake
May 6, 2018
Chicago, IL
Ragnar Chicago
May 18, 2018
Los Alamos, NM
Jemez Mountain Trail Runs
May 19, 2018
Greenville, SC
Knock on Wood Ultra Series
May 4, 2019
Millburn, NJ
Mayapple Trail Run
May 19, 2018
Des Moines, IA
Market to Market Relay - Iowa
May 11, 2019
Wartrace, TN
Strolling Jim Run
May 4, 2019
Ludington, MI
Veterans Memorial 150
May 25, 2019
Oakland, CA
Cinderella
May 12, 2018
New Gloucester, ME
Pineland Farms Trail Running Festival - Day Two
May 26, 2019
Ithaca, NY
Cayuga Trails 50
May 26, 2019
Faribault, MN
Maple Syrup Fun Run
May 5, 2018
Yellow Springs, OH
Tie Dye 50K
May 19, 2018
Terrebonne, OR
Smith Rock Ascent
May 12, 2018
Portersville, PA
Glacier Ridge Trail Ultra
May 11, 2019
Wendover, UT
Salt Flats Endurance Runs
May 3, 2019
Danville, PA
Montour 24 Endurance Runs
May 11, 2018
Hull, MA
Ragnar Cape Cod
May 11, 2018
Graford, TX
Possum's Revenge
May 19, 2018
Augusta, NJ
3 Days at the Fair - 48 Hour race plus Marathon and 50K
May 17, 2019
3 Days at the Fair - 24, 12 & 6 Hour races plus 50K and Marathon
May 18, 2019
Blue Ridge, GA
Cruel Jewel 100M
May 17, 2019
Cruel Jewel 50M
May 18, 2019
Susanville, CA
Paiute Meadows Trail Run
May 11, 2019
Valentine, NE
Cowboy Ultra
May 12, 2018
Bellevue, WA
Lake Hills 50K Relay
May 6, 2018
Titusville, FL
Florida Coast 2 Coast Relay
May 11, 2018
Buckeye, AZ
Hotfoot Hamster
May 5, 2018
Lithia Springs, GA
SweetH2O 50K
May 11, 2019
East Taunton, MA
Big Bear 30/50K
May 20, 2018
Ashburnham, MA
Wapack and Back Trail Races
May 12, 2018
Calhoun, GA
Sweet Southern Discomfort - Georgia
May 25, 2019
Burnet, TX
Pandora's Box of Rox Trail Run
May 5, 2018
Waxahachie, TX
Hachie 50
May 4, 2019
Rush City, MN
Growing Green Challenge - Day 2
May 27, 2018
Burnsville, NC
Quest For The Crest Trail Races
May 18, 2019
St. Francisville, LA
Beast For A Day
May 5, 2018
Eldridge, IA
Corn Belt Running Club 24 Hour Run
May 5, 2018
Marietta, SC
Knock on Wood Ultra Series
May 3, 2019
Meriden, KS
Lake Perry Trail Runs
May 19, 2018
Pisgah Forest, NC
Pisgah 55.5K Running Race
May 19, 2019
Cordesville, SC
Wambaw Swamp Stomp
May 4, 2019
Trail, OR
Lost Creek Trail Runs
May 5, 2018
Moreland, GA
Darkside 8 Hour Run
May 11, 2019
Priest Lake, ID
Priest Lake Marathon
May 12, 2018
Mt. Carmel, UT
Ragnar Trail Relay - Zion
May 11, 2018
Bath, OH
Regal Beagle Spring Run
May 12, 2018
Sharon Hill, PA
Dawn to Dusk to Dawn Ultras
May 12, 2018
Booneville, IA
Booneville Backroads Ultra
May 26, 2018
La Crosse, VA
Thoroughbred Races
May 5, 2018
Hewitt, NJ
NYARA Trail Series - Wawayanda
May 12, 2018
Olga, WA
Orcas Island 50M
May 12, 2018
Mouth of Wilson, VA
Grayson Highlands 50K
May 4, 2019
Coalgate, OK
Sizzlin' Sasquatch Spring Fling
May 19, 2018
Mt. Perry, OH
May Trail Race / Ray's Race
May 27, 2018
Glade Valley, NC
Get Outside Mountain Relay
May 31, 2019
Fort Collins, CO
Quad Rock 50
May 12, 2018
Elkhart, KS
Okie Relays
May 19, 2018
Snowshoe, WV
Cheat Mountain 50
May 25, 2019
St Stephen, SC
Palmetto Expedition
May 12, 2018
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| Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
City Location
1. Peak Bloodroot Ultra - 500M
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May 1, 2019Wednesday
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500M trail run
Race Link
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Pittsfield, VT
Rutland County, VT
2. Knock on Wood Ultra Series
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May 3, 2019Friday
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100M trail run
Race Link
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Marietta, SC
Greenville County, SC
3. Salt Flats Endurance Runs
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May 3, 2019Friday
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100M, 50M, 50K run
Race Link
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Wendover, UT
Tooele County, UT
4. Golden Gate Relay
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May 4, 2019Saturday
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199M relay
Race Link
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Calistoga, CA
Napa County, CA
5. Grayson Highlands 50K
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May 4, 2019Saturday
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50K, 13.1M trail run
Race Link
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Mouth of Wilson, VA
Grayson County, VA
6. Greenland Trail Races
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May 4, 2019Saturday
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50K, 25K, 8M trail run
Race Link
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Greenland, CO
Douglas County, CO
7. Hachie 50
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May 4, 2019Saturday
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50M, 50K, 26.2M run | 50M relay | kids run
Race Link
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Waxahachie, TX
Ellis County, TX
8. Knock on Wood Ultra Series
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May 4, 2019Saturday
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50K, 8K trail run | 24H relay | kids run
Race Link
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Greenville, SC
Greenville County, SC
9. Miwok 100K
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May 4, 2019Saturday
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100K trail run
Race Link
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Stinson Beach, CA
Marin County, CA
10. Outback in the Ozark - Pure Trail Edition
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Past DateMay 4, 2018Friday
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120M relay
Race Link
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Eureka Springs, AR
Carroll County, AR
11. Outrun 24 Hour Trail Race
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May 4, 2019Saturday
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24H trail run
Race Link
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Kirtland, OH
Lake County, OH
12. Rock The Ridge
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May 4, 2019Saturday
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50M run
Race Link
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New Paltz, NY
Ulster County, NY
13. Strolling Jim Run
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May 4, 2019Saturday
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41.2M, 26.2M, 13.1M, 10K run
Race Link
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Wartrace, TN
Bedford County, TN
14. Wambaw Swamp Stomp
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May 4, 2019Saturday
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50M, 50K trail run | 50M, 50K relay
Race Link
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Cordesville, SC
Berkeley County, SC
15. Wild Wild West Marathon & Ultras
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May 4, 2019Saturday
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50M, 31M, 26.2M, 10M, 3M trail run | kids run
Race Link
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Lone Pine, CA
Inyo County, CA
16. Armstrong Redwoods Trail Run
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Past DateMay 5, 2018Saturday
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50K, 30K, 17K, 9K, 5K trail run
Race Link
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Guerneville, CA
Sonoma County, CA
17. Beast For A Day
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Past DateMay 5, 2018Saturday
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12H, 6H, 3H, 5.6M run
Race Link
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St. Francisville, LA
West Feliciana County, LA
18. Big A 50K
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Past DateMay 5, 2018Saturday
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50K trail run
Race Link
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York, ME
York County, ME
19. Collegiate Peaks Trail Run
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Past DateMay 5, 2018Saturday
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50M, 25M trail run
Race Link
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Buena Vista, CO
Chaffee County, CO