| 17 May 2025 |
O'Neill Park Trail Races (30k|Half Marathon|10k|50k|Marathon) |
Trabuco Canyon, California, United States |
| 17 May 2025 |
Bishop High Sierra Ultras (50 Miler|55K|100K) |
Bishop, California, United States |
| 18 May 2025 |
NJ Ultra Festival (100 Miles) |
Hardwick Center, New Jersey, United States |
| 18 May 2025 |
Seaside Marathon (Marathon|5K|Half|10K) |
Sea Cliff, California, United States |
| 23 May 2025 |
Grand Union Canal (145 Miles) |
Birmingham, England, United Kingdom |
| 23 May 2025 |
Nanny Goat 100 (100 Miler) |
Riverside, California, United States |
| 24 May 2025 |
Pigtails Challenge (100 Miler) |
King County, Washington, United States |
| 24-26 May 2025 |
Stumptown Trail Runs (1/2 Marathon|50K) |
Portland, Oregon, United States |
| 25 May 2025 |
Calgary Marathon (5K|10K|50K|Half Marathon|Kid's Run|Marathon) |
Calgary, Alberta, Canada |
| 25 May 2025 |
Saskatchewan Marathon (42.2k|5k|21.1.k|10k) |
Saskatoon, Saskatchewan, Canada |
| 31 May 2025 |
Worlds End Ultramarathon (50k|100k) |
Forksville, Pennsylvania, United States |
| 01 Jun 2025 |
Rock 'n' Roll San Diego (Half|Marathon) |
San Diego, California, United States |
| 06 Jun 2025 |
Hell Hole Hundred (100M) |
Charleston, South Carolina, United States |
| 06 Jun 2025 |
San Diego 100 (100 Miler) |
Lake Cuyamaca, California, United States |
| 6-7 Jun 2025 |
SAMO 100 Mile/100k (100 Miler|100K) |
Malibu, California, United States |
| 07 Jun 2025 |
Malibu Canyon Trail Races (30K|50K|50 mile |100K) |
Malibu, California, United States |
| 07 Jun 2025 |
Warhammer 100 (100 Miler) |
Slade, Kentucky, United States |
| 7-14 Jun 2025 |
Huron 100 (Huron 100 Endurance Run |WP 50) |
Grass Lake, Michigan, United States |
| 07 Jun 2025 |
River of No Return (53k) |
Challis City Park, Idaho, United States |
| 7-14 Jun 2025 |
Cool Moon 100 (Cool Moon 11.5 miler (South Loop)|Cool Moon 100K|100 Miler|Cool Moon 25 miler|Cool Moon 5K|Cool Moon 13.5 mile (North Loop)|Cool Moon 50 miler) |
Cool, California, United States |