| 451 | 02 Nov 25 | 2025 For The Health Of It 5k | 5K | Fairfax Station, VA |
| 452 | 04 Oct 25 | 2025 Fort Hunt Park 5k/10k | 10K/5K | Alexandria, VA |
| 453 | 03 Aug 25 | 2025 Fort Ritchie Triathlon & Duathlon | triathlon | Cascade, MD |
| 454 | 26 Apr 25 | 2025 Foster the Family 5k/10k | 10K/1M/5K | Springfield, VA |
| 455 | 30 Aug 25 | 2025 Fox Island Sprint Triathlon #2 - TBA . . | triathlon | Fort Wayne, IN |
| 456 | 24 May 25 | 2025 Fox Island Triathlon #1 . . | triathlon | Fort Wayne, IN |
| 457 | 08 Jun 25 | 2025 Fox Lake Triathlon | triathlon | Fox Lake, IL |
| 458 | 29 Nov 25 | 2025 FredVegas Turkey Trot 5k/10k | 10K/1M/5K | Fredericksburg, VA |
| 459 | 06 Jul 25 | 2025 Freedom 5k/Half | 13.1/5K | Washington, DC |
| 460 | 14 Jun 25 | 2025 Freedom Fighters 5k/10k/Half | 10K/13.1/5K | Triangle, VA |
| 461 | 09 Nov 25 | 2025 Freedom is Never Free 5k/10k/Half | 10K/13.1/5K | Potomac, MD |
| 462 | 04 Jul 25 | 2025 Freedom Springs Triathlon | triathlon | Marianna, FL |
| 463 | 17 May 25 | 2025 French Creek Triathlon - SATURDAY . . | triathlon | Elverson, PA |
| 464 | 11 Jul 25 | 2025 Frisco Triathlon | triathlon | Frisco, CO |
| 465 | 06 Dec 25 | 2025 Frozen Footsteps 5k/10k | 10K/5K | Vienna, VA |