| 15 Aug 2021 |
Marlette 50K (50K) |
Lake Tahoe, Nevada, United States |
| 15 Aug 2021 |
Connemara 100 (100 Miles) |
County Galway, Connacht, Ireland |
| 19 Aug 2021 |
Headlands Hundred (100 Miler) |
Marin City, California, United States |
| 21 Aug 2021 |
Waldo (100K) |
Oakridge, Oregon, United States |
| 21 Aug 2021 |
Post Canyon 50K (50K) |
Hood River, Oregon, United States |
| 21 Aug 2021 |
Moose Mountain Trail Races (42K|29K) |
Bragg Creek, Alberta, Canada |
| 21-22 Aug 2021 |
Pikes Peak Ascent & Marathon (Marathon|Half Marathon) |
Manitou Springs, Colorado, United States |
| 21 Aug 2021 |
Leadville Trail 100 Run (100 Miles) |
Leadville, Colorado, United States |
| 21 Aug 2021 |
Twisted Branch Trail Run (100K) |
Naples, New York, United States |
| 24-27 Aug 2021 |
Ultra Trail du Monte Blanc (CCC|TDS|UTMB) |
Chamonix-mont-blanc, Haute-Savoie, France |
| 28 Aug 2021 |
Nut 100k & 50k (50k|100k) |
Rosebud, Oregon, United States |
| 28 Aug 2021 |
Shawnee Hills 100 (100K|50K|100 Miler) |
Ozark, Illinois, United States |
| 28 Aug 2021 |
Leeds & Liverpool Canal (130 Miles) |
Liverpool, England, United Kingdom |
| 28 Aug 2021 |
Oregon Cascades 100 (100 miles ) |
Sisters, Oregon, United States |
| 28 Aug 2021 |
Cascade Crest (100 Miler) |
Easton, Washington, United States |
| 28 Aug 2021 |
Ultra Trail de Mexico (100k|50k) |
Huasca De Ocampo, Hidalgo, Mexico |
| 3-5 Sep 2021 |
The Rut Mountain Runs (50k|28k|11k|VK) |
Big Sky, Montana, United States |
| 04 Sep 2021 |
Lake Sonoma 50 (50 Miler) |
Healdsburg, California, United States |
| 04 Sep 2021 |
Wildcat 100 (100 Miler) |
Beulah, Florida, United States |
| 04 Sep 2021 |
Snowdon Ultra (100 Miles|50 Miles) |
Betws Y Coed, Wales, United Kingdom |