| 17 May 2025 |
Quest for the Crest Trail Races (50K) |
Burnsville, North Carolina, United States |
| 17 May 2025 |
Dances with Dirt Gnaw Bone (26.2M|13.1M|50K|10K|50M) |
Nashville, Indiana, United States |
| 17 May 2025 |
Yamacraw (20K|50K) |
Stearns, Kentucky, United States |
| 17 May 2025 |
Bishop High Sierra Ultras (50 Miler|55K|100K) |
Bishop, California, United States |
| 17 May 2025 |
Ram Party (24K |50 Mile|50K|16K|33K|5K) |
Colorado Springs, Colorado, United States |
| 18 May 2025 |
Bay of Islands Run Walk Festival (Trek Trail & Fish 50km Ultra Marathon|Half Marathon|8.7km|Hotprintz 6km Walk) |
Paihia, Northland, New Zealand |
| 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 May 2025 |
Zegama-Aizkorri (Marathon) |
Zegama, Basque Country, Spain |
| 24-26 May 2025 |
Stumptown Trail Runs (1/2 Marathon|50K) |
Portland, Oregon, United States |
| 25 May 2025 |
Saskatchewan Marathon (42.2k|5k|21.1.k|10k) |
Saskatoon, Saskatchewan, Canada |
| 25 May 2025 |
Calgary Marathon (5K|10K|50K|Half Marathon|Kid's Run|Marathon) |
Calgary, Alberta, Canada |
| 30 May 2025 |
TRBW25 - half (5- Halve (midden) afstand - hardlopen|3 - Halve (midden) afstand - fietsen|2 - Zwemmen - fietsen|4 - Fietsen - hardlopen|1- Halve (midden) afstand - zwemmen) |
Bergen Op Zoom, North Brabant, Netherlands |
| 30 May 2025 |
TRIBW25 - kwart (1 Zwemmen - kwart|3 Fietsen- kwart|4 Hardlopen - kwart|3 Fietsen - hardlopen|2 Zwemmen - fietsen) |
Bergen Op Zoom, North Brabant, Netherlands |
| 30 May 2025 |
TRIBW25 - achtste (4 TRIBW- Fietsen - hardlopen|5 TRIBW25 lopen achtste|3 TRIBW25 fietsen achtste|2 TRIBW25 zwemmen - fietsen|1 TRIBW25 zwemmen achtste) |
Bergen Op Zoom, North Brabant, Netherlands |
| 31 May 2025 |
Smith Rock Classic (10 Miler|50K|50 Miler) |
Jefferson County, Oregon, United States |
| 31 May 2025 |
Kinzua Half Marathon & 5k (5k|Half Marathon) |
Mount Jewett, Pennsylvania, United States |