| 23 Apr 2021 |
Ultra Trail Mt. Fuji (100 Miler) |
Fuji-shi, Shizuoka, Japan |
| 24 Apr 2021 |
Born to Run (100M) |
Santa Ynez, California, United States |
| 24 Apr 2021 |
The Canyons Endurance Runs (50k|100K) |
Foresthill, California, United States |
| 24 Apr 2021 |
Zane Grey (100K) |
Pine, Arizona, United States |
| 24 Apr 2021 |
C&O Canal 100 (100 Miles) |
Water Acres, Maryland, United States |
| 25 Apr 2021 |
Big Sur International Marathon (Marathon) |
Big Sur, California, United States |
| 25 Apr 2021 |
Eugene Marathon (Marathon) |
Eugene, Oregon, United States |
| 28 Apr 2021 |
Sentinel Hill Climb (1.6 Miles, 1,900 feet of climbing) |
Missoula, Montana, United States |
| 30 Apr 2021 |
Salt Flats Endurance Runs (50 Miler|100 Miler) |
Wendover, Utah, United States |
| 01 May 2021 |
Xterra Crystal Cove Trail Run (6k|15k) |
Newport Beach, California, United States |
| 01 May 2021 |
Phantom Trail Races (10 Miler) |
Cornell, California, United States |
| 01 May 2021 |
Xterra Topanga Turkey Trot (10k|15k|5k) |
Topanga, California, United States |
| 01 May 2021 |
Xterra Boney Mountain (21k|6k) |
Newbury Park, California, United States |
| 01 May 2021 |
Lost Lake (50K|25K) |
Bellingham, Washington, United States |
| 01 May 2021 |
Sycamore Canyon (50 K|100 K) |
Poway, California, United States |
| 01 May 2021 |
Collegiate Peaks Trail Run (25 Miler|50 Miler) |
Buena Vista, Colorado, United States |
| 02 May 2021 |
Tillamook Burn Trail Run (50K) |
Tillamook State Forest, Oregon, United States |
| 02 May 2021 |
Verdugo Mountains 10k (10k) |
Glendale, California, United States |
| 02 May 2021 |
BMO Vancouver Marathon (Marathon|Half Marathon) |
Vancouver, British Columbia, Canada |
| 02 May 2021 |
Volkswagen Prague Marathon (Marathon) |
Prague, PR, Czechia |
| 03 May 2021 |
Cocodona 250 (250 Miles) |
Rock Springs, Arizona, United States |
| 08 May 2021 |
Breakneck Point Trail Runs (42K|21K) |
Beacon, New York, United States |
| 08 May 2021 |
Ice Age Trail Endurance Runs (50 Miler|Half Marathon|50k) |
La Grange, Wisconsin, United States |
| 08 May 2021 |
Yosemite Half Marathon (Half Marathon) |
Yosemite National Park, California, United States |
| 08 May 2021 |
Quicksilver (100K|50K) |
San Jose, California, United States |
| 08 May 2021 |
Riverlands 100 (100 Miler) |
Auburn Plains, Maine, United States |
| 08 May 2021 |
Thames Path 100 (100 Miles) |
London, England, United Kingdom |
| 08 May 2021 |
Quad Rock 50 (25 Miler|50 Miler) |
Fort Collins, Colorado, United States |
| 08 May 2021 |
McDonald Forest 50k (50k) |
Benton County, Oregon, United States |
| 14 May 2021 |
Devon Coast to Coast (117 Miles) |
South Hams, England, United Kingdom |
| 14 May 2021 |
SAMO 100 Mile (100 Miler) |
Sycamore Cove, California, United States |
| 15 May 2021 |
Ultra-Trail Austrailia (100k|50k) |
Katoomba, New South Wales, Australia |
| 15 May 2021 |
Tyne Trail South (70k) |
Eden, England, United Kingdom |
| 15-16 May 2021 |
Smith Rock Ascent (15 Miler|50K|4 Miler) |
Terrebonne, Oregon, United States |
| 15 May 2021 |
Quest for the Crest Trail Races (50K) |
Burnsville, North Carolina, United States |
| 15 May 2021 |
Keys 100 (100 Miles) |
Newport, Florida, United States |
| 15 May 2021 |
PCT 50 (50 Miler) |
Cleveland National Forest, California, United States |
| 15 May 2021 |
Massanutten Mountain Trails 100 (100 Miler) |
Kings Crossing, Virginia, United States |
| 15 May 2021 |
Mary's Peak Trail Run (25K|50K|50 Miler) |
Blodgett, Oregon, United States |
| 21 May 2021 |
Infinitus (100 Miler) |
Goshen, Vermont, United States |
| 22 May 2021 |
North Downs Way 50 (50 Miles) |
Waverley, England, United Kingdom |
| 22-29 May 2021 |
Bishop High Sierra Ultras (55K|50 Miler|100K) |
Bishop, California, United States |
| 22 May 2021 |
Jemez Mountain (15 Miler|50 Miler|50K) |
Los Alamos, New Mexico, United States |
| 22 May 2021 |
Silver Moon Race (100-Miles|24-Hours|12-Hours|6-Hours) |
Reedley, California, United States |
| 22 May 2021 |
Silver Moon Race (100 Miles) |
Fresno County, California, United States |
| 22 May 2021 |
Pen Llyn Ultra (100 Miles|50 Miles|75 Miles) |
Y Ffor, Wales, United Kingdom |
| 23 May 2021 |
Hootenanny 50k (50k & Relay) |
Lolo, Montana, United States |
| 28 May 2021 |
Ancient Trails: Run the Ridgeway (Ancient Trails: Run the Ridgeway) |
Avebury, England, United Kingdom |
| 29 May 2021 |
Survival of the Fittest 35k (35k) |
Squamish, British Columbia, Canada |
| 29 May 2021 |
Nanny Goat 100 (100 Miler) |
Riverside, California, United States |
| 29 May 2021 |
Chester Ultra 100 (100 Miles) |
Waverton, England, United Kingdom |
| 29-31 May 2021 |
Stumptown Trail Runs (50K|1/2 Marathon) |
Portland, Oregon, United States |
| 29 May 2021 |
Survival of the Fittest 18k (18k) |
Squamish, British Columbia, Canada |
| 29 May 2021 |
Pigtails Challenge (100 Miler) |
King County, Washington, United States |
| 29 May 2021 |
Grand Union Canal (145 Miles) |
Birmingham, England, United Kingdom |
| 30 May 2021 |
Mountains 2 Beach (Marathon|Half-Marathon) |
Ojai, California, United States |
| 04 Jun 2021 |
San Diego 100 (100 Miler) |
Lake Cuyamaca, California, United States |
| 4-6 Jun 2021 |
Ultra-Trail Snowdonia (50 Miles|100 Miles|30 Miles) |
Fachwen, Wales, United Kingdom |
| 04 Jun 2021 |
Scout Mountain Trail Ultras (100 Miler) |
Pocatello, Idaho, United States |
| 05 Jun 2021 |
Old Dominion 100 Mile (100 Miler) |
Fort Valley, Virginia, United States |
| 05 Jun 2021 |
Ridge Route Ultra (50k) |
Los Angeles County, California, United States |
| 05 Jun - 02 Oct 2021 |
Bear Mountain (12 km|8 km) |
Mission, British Columbia, Canada |
| 05 Jun 2021 |
Hell Hole Hundred (100M 5 Per Relay) |
Charleston, South Carolina, United States |
| 05 Jun 2021 |
Loco Race Series (100 Miler) |
Butte Meadows, California, United States |
| 05 Jun 2021 |
Ruck a Chuck 50k (50K) |
Foresthill, California, United States |
| 05 Jun 2021 |
Worlds End Ultramarathon (50k|100k) |
Forksville, Pennsylvania, United States |
| 10 Jun 2021 |
Warhammer 100 (100 Miles) |
Slade, Kentucky, United States |
| 11 Jun 2021 |
The Cotswold Way (Cotswold Way: North to South) |
Cotswold, England, United Kingdom |
| 12 Jun 2021 |
Mountain to Meadow (Half Marathon|10k) |
Lolo, Montana, United States |
| 12 Jun 2021 |
Kettle Moraine 100 Endurance Run (100K|100 Miler) |
Whitewater, Wisconsin, United States |
| 12 Jun 2021 |
Golden Gate Dirty 30 (12 Miler|50k) |
Black Hawk, Colorado, United States |
| 12 Jun 2021 |
Lumberjack 100 (100 Miler) |
Port Gamble, Washington, United States |
| 12 Jun 2021 |
Lighthouse 100 (100 Miler) |
Petoskey, Michigan, United States |
| 12 Jun 2021 |
Holcolm Valley Trail Run (7 Miles|15 Miles|33 Miles) |
Minnelusa, California, United States |
| 12 Jun 2021 |
South Downs Way 100 (100 Miles) |
Winchester, England, United Kingdom |
| 12 Jun 2021 |
River of No Return (53k) |
Challis City Park, Idaho, United States |
| 12 Jun 2021 |
Old Gabe (30K|50K) |
Bozeman, Montana, United States |
| 12 Jun 2021 |
Sinks Canyon Rough & Tumble Trail Runs (50K|18K) |
Lander, Wyoming, United States |
| 18-19 Jun 2021 |
Bighorn Trail Run (32 Miler|100 Miler|52 Miler) |
Sheridan, Wyoming, United States |
| 19 Jun 2021 |
Funk Bottoms Gravel 100K\200K (200K|100K) |
Glenmont, Ohio, United States |
| 19 Jun 2021 |
Ultra Trail Gaspesia 100 (100 Miles) |
Percé, Quebec, Canada |
| 19 Jun 2021 |
Leadville Trail Marathon & Heavy Half (Heavy Half|Marathon) |
Leadville, Colorado, United States |
| 19 Jun 2021 |
Old Cascadia (50 Miler|100 Miler) |
Blue River, Oregon, United States |
| 19 Jun 2021 |
Sugar Daddy Race (Kids Fun Run|5K|10K|Half Marathon) |
Santa Clarita, California, United States |
| 19 Jun 2021 |
Black Mountain 50K/25K/Half (50K|25K|Half Marathon) |
San Diego, California, United States |
| 19 Jun 2021 |
F2FC 5k (F2FC 5k) |
Windham, New Hampshire, United States |
| 19 Jun 2021 |
Montane Spine Fusion (268 Miles) |
High Peak, England, United Kingdom |
| 19 Jun 2021 |
Grandma's Marathon (Marathon) |
Two Harbors, Minnesota, United States |
| 19 Jun 2021 |
West Highland Way (100 Miles) |
Milngavie, Scotland, United Kingdom |
| 19 Jun 2021 |
Jurassic Coast (100 Miles) |
Dorset, England, United Kingdom |
| 19 Jun 2021 |
Mohican 100 (100M) |
Loudonville, Ohio, United States |
| 19 Jun 2021 |
Hike to Manzanita Aid Station (Hike to Manzanita Aid Station) |
San Diego, California, United States |
| 20 Jun 2021 |
Hood to Coast (Relay) |
Mt. Hood, Oregon, United States |
| 25 Jun 2021 |
The North Face Lavaredo Ultra Trail (CT 48 KM|LUT 120 KM) |
Cortina D'ampezzo, Belluno, Italy |
| 25 Jun 2021 |
Black Hills 100 (50K|100 Miler|50 Miler) |
Sturgis, South Dakota, United States |
| 26 Jun 2021 |
Glacier Half Marathon (Half Marathon) |
Browning, Montana, United States |
| 26 Jun 2021 |
The Runfield Texas Race Series (5K) |
Buda, Texas, United States |
| 26 Jun 2021 |
Western States (100-Mile Endurance Run) |
Squaw Valley, California, United States |
| 26 Jun 2021 |
Bryce Canyon Ultras (50k|50 Miler|100 Miler) |
Bryce Canyon, Utah, United States |
| 26 Jun 2021 |
San Juan Soltice 50 Mile Run (50 Miler) |
Lake City, Colorado, United States |