| 286 | 27 Jul 25 | 2025 Sylvania Triathlon, Duathlon, Aquabike . . | triathlon | Sylvania, OH |
| 287 | 27 Jul 25 | Great Buckeye Challenge | Olympic/Sprint/supersprint duathlon/supersprint triathlon | Springfield, OH |
| 288 | 27 Jul 25 | 2025 Great Buckeye Triathlon & Duathlon . . | triathlon | Springfield, OH |
| 289 | 27 Jul 25 | Millersburg Food Run | 1M/5K/10K | Millersburg, OH |
| 290 | 30 Jul 25 | Betty Zane Days 5K | 5K | Martins Ferry, OH |
| 291 | 30 Jul 25 | Clipper Cross Country Series | 3K | Columbiana, OH |
| 292 | 31 Jul 25 | Dublin Irish Festival 5K | 5K | Dublin, OH |
| 293 | 01 Aug 25 | 2025 USA Triathlon Youth & Junior National Championships . . | triathlon | West Chester Township, OH |
| 294 | 01 Aug 25 | Minervastrong Memorial 5K | 5K | Minerva, OH |
| 295 | 01 Aug 25 | Front Street Relay | 4M | Fremont, OH |
| 296 | 01 Aug 25 | Royal Docks Backyard Crusher 5K | 5K | Canton, OH |
| 297 | 02 Aug 25 | Dresden Melon Festival 10K and 5K | 5K/10K | Dresden, OH |
| 298 | 02 Aug 25 | Ninja 1M, 5K, 10K, 15K, & Half Marathon | 1M/5K/10K/15K/13.1M | Beavercreek, OH |
| 299 | 02 Aug 25 | Elyse Black Memorial 5K | 5K | Jackson, OH |
| 300 | 02 Aug 25 | W.A.G.S. Wonder Run 5K | 1M/5K | Berea, OH |