| Month |
Race Name |
Events |
Location |
Near |
|
| May |
Capon Valley 50K Run |
50 km |
WV, United States |
Yellow Spring |
|
| May |
Ice Age Trail 50 |
50 mi, 50 km |
WI, United States |
La Grange |
|
| May |
Massanutten Mountain Trails 100 Mile Run |
101.8 mi |
VA, United States |
Front Royal |
|
| May |
XTERRA Malibu Creek Trail Challenge Scramble |
14 mi, 4 mi |
CA, United States |
Calabasas |
|
| May |
Spring Salmon Run |
10 km |
CA, United States |
Nevada City |
|
| May |
Long Island Greenbelt Trail 50K and 25K Runs |
50 km, 25 km |
NY, United States |
Plainview |
|
| May |
Watershed Preserve 12-Hour Trail Race |
26.2 mi |
WA, United States |
Redmond |
|
| May |
Mt Wilson Trail Race |
8.6 mi |
CA, United States |
Sierra Madre |
|
| May |
Wyoming Marathon Races |
52.4 mi, 26.2 mi, 13.1 mi, 5 km |
WY, United States |
Laramie |
|
| May |
Silver State 50/50 Endurance Run |
50 mi, 50 km, 13.1 mi |
NV, United States |
Reno |
|
| May |
Forest Park Trail Run 10km, 20km & 50km |
50 km, 20 km, 10 km |
OR, United States |
Portland |
|
| May |
VCTC Summer X-C Series 1 |
5 km |
NY, United States |
Bronx |
|
| May |
Pilot Hill 25K Classic |
25 km |
WY, United States |
Laramie |
|
| May |
Runnin The Rocks - 10K/5K |
6.2 mi, 3.1 km |
GA, United States |
Conyers |
|
| May |
Dandelion Run |
5 km |
OH, United States |
Dover |
|
| May |
Sky Mesa Pass Trail Marathon |
26.2 mi |
CO, United States |
Grand Junction |
|
| May |
Trail Trial 10k |
10 km, 10 km |
VA, United States |
Charlottesville |
|
| May |
Sunflower Relay and Iron Event |
26 mi |
WA, United States |
winthrop |
|
| May |
DRTE 100 Mile/100K |
100 mi, 100 km, 50 km |
CA, United States |
Santa Barbara |
|
| May |
Muddy Marathon with QM, HM option |
26.2 mi, 13.1 mi, 6.6 mi |
NJ, United States |
Rockaway NJ |
|
| May |
Fat Tire Trail Challenge - Black Hills Trail Series |
4 mi |
SD, United States |
Rapid City |
|
| May |
Alkali Creek Trail Race |
8 mi |
SD, United States |
Sturgis |
|
| May |
Cinderella Trail Run (5 Mile, Half Marathon, 30K, Marathon, 50K) |
50 km, 26.2 mi, 30 km, 13.1 mi, 5 mi |
CA, United States |
Oakland |
|
| May |
Scenic City Trail Marathon |
26.2 mi |
TN, United States |
Chattanooga |
|
| May |
The Sage Burner |
50 km, 25 km |
CO, United States |
Gunnison |
|
| May |
The Ironmaster's Challenge |
26.6 mi, 9.7 mi |
PA, United States |
Gardners |
|
| May |
Sehgahunda Trail Marathon & Relay |
26.2 mi |
NY, United States |
Mt. Morris |
|
| May |
Greenland Trail 50K, 25K, 8M |
50 km, 25 km, 8 mi |
CO, United States |
Larkspur |
|
| May |
Purple Cloth 5K and Kid's Dash |
5 km |
NC, United States |
Raleigh |
|
| May |
Flying Eagle Adventure Series |
5 km |
FL, United States |
Bradenton |
|
| May |
Big Trees Trail Run |
50 km, 30 km, 13.1 mi, 10 km |
CA, United States |
Oakland |
|
| May |
China Camp Trail Run |
13.1 mi, 10 km, 5 km |
CA, United States |
San Rafael |
|
| May |
Timp Trail Marathon & Half Marathon |
27.4 mi, 13.1 mi |
UT, United States |
Pleasant Grove |
|
| May |
Into the Wildlands Limestone Eco Challenge 12k/20k |
20 km, 12 km |
CA, United States |
Orange |
|
| May |
Sulphur Springs Trail Run |
100 mi, 50 mi, 50 km, 25 km, 10 km |
ON, Canada |
Ancaster |
|
| May |
Happy Camper 5K Trail Run |
5 km |
WI, United States |
Three Lakes |
|
| May |
Cougar Half Marathon Trail Run |
13.1 mi |
CA, United States |
San Diego |
|
| May |
Loop the Lakes |
21 km, 15 km |
BC, Canada |
Squamish |
|
| May |
Wesley Woods Annual 5K Fun Run/Walk |
5 km |
MI, United States |
Dowling |
|
| May |
Draper Trail Days |
10 mi |
UT, United States |
Salt Lake City |
|
| May |
Ring the Bell Trail Run |
16 mi, 8 mi |
CA, United States |
Rancho Santa Margarita |
|
| May |
Twisted Ankle Trail Marathon & Half Marathon |
13.1 mi |
GA, United States |
Summerville |
|
| May |
Armstrong Redwoods/Austin Creek Trail Run |
50 km, 30 km, 17 km, 9 km |
CA, United States |
Guerneville |
|
| May |
14K(arat) Women's Trail Run |
14 km, 5 km |
WI, United States |
West Bend |
|
| May |
The Beer Relay |
6 mi |
CO, United States |
Lyon's |
|
| May |
Ride the Wind 100M/50M |
100 mi |
NV, United States |
Las Vegas |
|
| May |
Western Pacific Marathon/Half Marathon/10K/5K |
26.2 mi, 13.1 mi, 10 km, 5 km |
CA, United States |
Fremont |
|
| May |
Wildcat Half Marathon/10K/5K |
13.1 mi, 10 km, 5 km |
CA, United States |
El Sobrante |
|
| May |
Nitro Trail Half Marathon/10K/5K |
13.1 mi, 10 km, 5 km |
CA, United States |
Pinole |
|
| May |
Mount Diablo Trail Run (Summer) |
50 km, 25 km, 8 km |
CA, United States |
Clayton |
|
| May |
Chuckanut Mountain Marathon and Half |
26.2 mi, 13.1 mi |
WA, United States |
Bellingham |
|
| May |
The North Face Dirty Feet Trail Run #2 |
21 km, 10 km, 5 km |
BC, Canada |
Kelowna |
|
| May |
Flight of Fire |
13.1 mi, 10 km, 5 km |
NV, United States |
Las Vegas |
|
| May |
Soboba Trail Race |
25 km, 10 km, 5 km |
CA, United States |
San Jacinto |
|
| May |
Hardwood Trail Running Series Race #1 |
10 km, 5 km |
ON, Canada |
Barrie |
|
| May |
Black Mountain Monster 5K/6HR/12HR/24HR Ind. & Team Race/Fundraiser |
5 km |
NC, United States |
Black Mountain |
|
| May |
Wildflower Half |
50 km, 25 km, 10 km, 5 km |
TX, United States |
Austin |
|
| May |
Ragnar Trail Zion - UT, Presented by Salomon |
125 mi |
UT, United States |
Mt. Carmel |
|
| May |
The Lone Coyote 8 Mile Dash |
8 mi |
CA, United States |
San Francisco |
|
| May |
OWBC Redbud Trail Challenge |
20 km, 10 km, 5 km |
OH, United States |
Caldwell |
|
| May |
Stateline Loop 5K/10K Trail Race for Conservation |
10 km, 5 km |
PA, United States |
Kennett Square |
|
| May |
Vegas Virgin Voyage |
80 mi |
NV, United States |
Las Vegas |
|
| May |
The Cumby |
20 km |
BC, Canada |
Cumberland |
|
| May |
SAGE Spring Run-Off Trail Race |
10 mi, 5 mi |
CO, United States |
Wolcott |
|
| May |
Don't Fence Me In Trail Runs |
30 km, 12 km, 5 km |
MT, United States |
Helena |
|
| May |
Sasquatch Trail 5k and Kids Race |
3.4 mi |
CA, United States |
Fresno |
|
| May |
Mother's Day Weekend Meso Run |
5 km |
CA, United States |
Los Angeles |
|
| May |
Hood Mountain Vertical Challenge |
9 mi |
CA, United States |
Santa Rosa |
|
| May |
Boulder Mountain Marathon and 10-mile Ascent |
26.2 mi, 10 mi |
CO, United States |
Gold Hill |
|
| May |
Ancient Redwood Running Festival |
12 mi, 10 mi, 6 mi, 5 mi |
CA, United States |
|
|
| May |
Spring Backyard Burn 5M/10M Trail Running Series-Race #4 |
10 mi, 5 mi |
VA, United States |
Lorton |
|
| May |
EX2 Adventures Reservoir Relay Trail Run |
18 mi |
VA, United States |
Clifton |
|
| May |
Quicksilver 100K and 50K |
100 km, 50 km |
CA, United States |
San Jose |
|
| May |
Collegiate Peaks Trail Run |
50 mi, 25 mi |
CO, United States |
Buena Vista |
|
| May |
Press Forward 5K Trail Run |
5 km |
VA, United States |
Fredericksburg |
|
| May |
Ragnar Trail Kentuckiana-KY, Presented by Salomon |
125 mi |
KY, United States |
Brandenburg |
|
| May |
Fear the Deer trail 1/2 marathon |
13.1 mi |
CO, United States |
Littleton |
|
| May |
The North Face Endurance Challenge – New York |
50 mi, 50 km, 26.2 mi, 13.1 mi, 10 km, 5 km |
NY, United States |
Albany |
|
| May |
Cheyenne Mountain Ultra 10x5k |
50 km, 5 km |
CO, United States |
Colorado Springs |
|
| May |
Wildflower 10.7 Mile Trail Run |
10.7 mi |
CA, United States |
Bradley |
|
| May |
Fruita Trail Half |
13.8 mi |
CO, United States |
Fruita |
|
| May |
Hacienda Hills Run |
50 km, 26.2 mi, 13.1 mi, 9 mi, 10 km, 5 km |
CA, United States |
San Jose |
|
| May |
Sly Park Lake Trail Run |
50 km, 26.2 mi, 18 mi, 13.1 mi, 8.5 mi, 10 km, 5 km |
CA, United States |
Pollock Pines |
|
| May |
John Wayne Grit Series – Pioneertown, CA Half Marathon & 10k |
13.1 mi, 10 km |
CA, United States |
San Bernardino |
|
| May |
Wolf Moon 15K |
15 km |
PA, United States |
Pittsburgh |
|
| May |
Space2Thrive |
5 km |
MA, United States |
Wrentham |
|
| May |
Pine Trail Run |
50 km, 9 mi, 5 km |
AZ, United States |
Pine |
|
| May |
War-X Blackout 5K Night Run |
5 km |
OH, United States |
Jackson |
|
| May |
Placerville Path Memorial Day Run |
13.1 mi, 15 km, 10 km, 5 km |
CA, United States |
Placerville |
|
| May |
Valkyrie Trail Race |
50 km, 26.2 mi, 30 km, 13.1 mi, 8 mi, 4 mi |
CO, United States |
Colorado Springs |
|
| May |
THE OTHER'S DAY 5K |
5 km, 1 mi |
NC, United States |
Belmont |
|
| May |
Chupacabra 50 |
50 mi, 53 km, 20 km, 9 mi |
TX, United States |
Quanah |
|
| May |
Quad Rock 50/25mi |
50 mi, 25 mi |
CO, United States |
Fort Collins |
|
| May |
Adventurefest |
13.8 mi |
CO, United States |
Fruita |
|
| May |
Thelma and Louise |
50 km, 26.2 mi, 13.1 mi, 15 km |
UT, United States |
Moab |
|
| May |
Big Sur Land Trust's Race for Open Space Adventure Course |
21 mi, 9.5 mi, 8.5 mi, 2 mi |
CA, United States |
Monterey |
|
| May |
East Texas Ultra |
50 km, 28 km, 14 km, 7 km |
TX, United States |
Pittsburg |
|
| May |
Wicked Bottom Cross Country 5K, 10K & 1/2 mile Fun Run |
10 km, 5 km, 1 mi |
VA, United States |
Culpeper |
|
| May |
Giddy Up 5k |
5 km |
CA, United States |
Temecula |
|
| May |
The Lost Treasure Trail Race |
25 km, 10 km, 10 km, 5 km |
ON, Canada |
Mulmur |
|
| May |
Crystal Lake Ski and Outdoor Center 8th Annual Trail Race |
25 km, 5 km |
PA, United States |
Williamsport |
|
| May |
Leavenworth Trail Fest |
55 km, 27 km, 5 km |
WA, United States |
Leavenworth |
|
| May |
Selkirk Slacker 12hr Ultra Trail Run and Relay |
5 km |
BC, Canada |
Golden |
|
| May |
Moonlight Bootlegger 5k |
5 km |
MI, United States |
Northville |
|
| May |
Highball to Thurmond Ultra & Relay |
50 mi, 50 mi, 55 km |
WV, United States |
Thurmond |
|
| May |
Trail Run Xtreme |
12 km, 3 km |
IN, United States |
Portage |
|
| May |
Wildflower Trail Races |
100 km, 50 km, 25 km, 13.1 mi, 7 mi, 10 km, 5 km |
TX, United States |
Bastrop |
|
| May |
Feel The Burn Trail Runs |
50 km, 30 km, 20 km, 10 km |
AR, United States |
North Little Rock |
|
| May |
Hairy-Halfway Hike or Hustle |
11.2 mi |
PA, United States |
Mifflinburg |
|
| May |
Dynafit Boneyard Boogie 14k & 6k |
14.5 km, 6 km |
CO, United States |
Eagle |
|
| May |
Hollywood to the Sea Road & Trail Relay |
75 mi |
CA, United States |
Hollywood |
|
