| 03 May 2025 |
Thames Path 100 (100 Miles) |
London, England, United Kingdom |
| 3-4 May 2025 |
Klipspringer Challenge (Lite Day 1|Lite Day 2|Challenge Day 1|Challenge Day 2) |
Augrabies, Northern Cape, South Africa |
| 04 May 2025 |
Breakneck Point Trail Runs (21K|42K) |
Beacon, New York, United States |
| 04 May 2025 |
BMO Vancouver Marathon (Half Marathon|Marathon) |
Vancouver, British Columbia, Canada |
| 04 May 2025 |
Flying Pig Marathon (Marathon|Half|10K) |
Cincinnati, Ohio, United States |
| 04 May 2025 |
Verdugo Mountains 10k (10k) |
Glendale, California, United States |
| 5-9 May 2025 |
Cocodona (Sedona Canyons 125|Elden Crest 36|Cocodona 250) |
Rock Springs, Arizona, United States |
| 09 May 2025 |
Hellbender 100 (100-Miler) |
Old Fort, North Carolina, United States |
| 10 May 2025 |
Riverlands 100 (100 Miler) |
Auburn Plains, Maine, United States |
| 10 May 2025 |
Proposed GOTR Spring 2025 5k Route (5K) |
St. Louis, Missouri, United States |
| 10 May 2025 |
Quicksilver (100K|50K) |
San Jose, California, United States |
| 10 May 2025 |
Thunderbunny Trail Races (25K|11K|50K) |
Athens, Ohio, United States |
| 10 May 2025 |
Jemez Mountain (50K|15 Miler|50 Miler) |
Los Alamos, New Mexico, United States |
| 10 May 2025 |
Survival of the Fittest 18k (18k) |
Squamish, British Columbia, Canada |
| 10 May 2025 |
Yosemite Half Marathon (Half Marathon) |
Yosemite National Park, California, United States |
| 10 May 2025 |
PCT 50 (50 Miler) |
Cleveland National Forest, California, United States |
| 10 May 2025 |
Ice Age Trail Endurance Runs (50k|Half Marathon|50 Miler) |
La Grange, Wisconsin, United States |
| 10 May 2025 |
Survival of the Fittest 35k (35k) |
Squamish, British Columbia, Canada |
| 11 May 2025 |
Tillamook Burn Trail Run (50K) |
Tillamook State Forest, Oregon, United States |
| 12 May 2025 |
Bryce Canyon Ultras (100 Miler|50k|50 Miler) |
Bryce Canyon, Utah, United States |