| 11 May 2024 |
Jemez Mountain (50K|15 Miler|50 Miler) |
Los Alamos, New Mexico, United States |
| 11 May 2024 |
Quicksilver (100K|50K) |
San Jose, California, United States |
| 12 May 2024 |
Tillamook Burn Trail Run (50K) |
Tillamook State Forest, Oregon, United States |
| 17 May 2024 |
Born to Run (100M) |
Santa Ynez, California, United States |
| 17 May 2024 |
Cape Cod's Run Against the Tides 50 Miler - Unsanctioned Ultra - May 2024 Event (50 miler) |
Provincetown, Massachusetts, United States |
| 17 May 2024 |
Cruel Jewel 100 (100 Miler) |
Blairesville, Georgia, United States |
| 17 May 2024 |
Infinitus (100 Miler) |
Goshen, Vermont, United States |
| 18 May 2024 |
Ultra-Trail Austrailia (50k|100k) |
Katoomba, New South Wales, Australia |
| 18 May 2024 |
Lázeňský běh - 10 km (Rychlých 10 km) |
Teplice Nad Bečvou, Olomoucký, Czechia |
| 18 May 2024 |
Massanutten Mountain Trails 100 (100 Miler) |
Kings Crossing, Virginia, United States |
| 18 May 2024 |
North Downs Way 50 (50 Miles) |
Waverley, England, United Kingdom |
| 18-19 May 2024 |
Ram Party (24K|33K|50 Mile|50K|5K|16K) |
Colorado Springs, Colorado, United States |
| 18 May 2024 |
Lázeňský běh - TRAIL 20 km (trailRUN 25km) |
Teplice Nad Bečvou, Olomoucký, Czechia |
| 18 May 2024 |
Bishop High Sierra Ultras (50 Miler|55K|100K) |
Bishop, California, United States |
| 18 May 2024 |
Quest for the Crest Trail Races (50K) |
Burnsville, North Carolina, United States |
| 18 May 2024 |
Bryce Canyon Ultras (100 Miler|50k|50 Miler) |
Bryce Canyon, Utah, United States |
| 19 May 2024 |
Rocky Roccoon (100 Miles) |
Moore Grove, Texas, United States |
| 19 May 2024 |
NJ Ultra Festival (100 Miles) |
Hardwick Center, New Jersey, United States |
| 24 May 2024 |
Grand Union Canal (145 Miles) |
Birmingham, England, United Kingdom |
| 25 May 2024 |
Armed Forces Half Marathon at Briones Regional Park (Armed Forces Half Marathon) |
Contra Costa County, California, United States |