| 421 | 24 May 25 | 2025 Extinguish Cancer 5k | 1M/5K | Fairfax Station, VA |
| 422 | 24 May 25 | 2025 F2BK Splash & Dash . . | triathlon | Rockville, MD |
| 423 | 20 Sep 25 | 2025 Fall Burke Lake 5k/10k | 10K/13.1/5K | Fairfax Station, VA |
| 424 | 02 Nov 25 | 2025 Fall City Views 5k/10k | 10K/5K | Alexandria, VA |
| 425 | 28 Sep 25 | 2025 Fall Classic Duathlon | triathlon | Lake Elmo, MN |
| 426 | 05 Oct 25 | 2025 Fall Foliage 5k/10k | 10K/5K | College Park, MD |
| 427 | 15 Nov 25 | 2025 Fall Run for the Wounded 5k/10k/Half | 10K/13.1/5K | Triangle, VA |
| 428 | 11 Oct 25 | 2025 FALL Wicked Wine Run El Paso | 1K/5K | La Union, NM |
| 429 | 26 May 25 | 2025 Fallen Soldiers Memorial 5k/10k/Half | 10K/13.1/5K | Potomac, MD |
| 430 | 13 Jul 25 | 2025 Falmouth Sprint Triathlon | triathlon | Falmouth, MA |
| 431 | 15 Jun 25 | 2025 Father's Day 5k/10k | 10K/5K | Silver Spring, MD |
| 432 | 14 Jun 25 | 2025 Father's Day 5k/10k/1M | 10K/1M/5K | Fredericksburg, VA |
| 433 | 24 Aug 25 | 2025 Fawn Lake Sprint Triathlon | triathlon | Spotsylvania Courthouse, VA |
| 434 | 27 Jul 25 | 2025 Findley Lake Triathlon Festival . . | triathlon | Findley Lake, NY |
| 435 | 07 Sep 25 | 2025 Finger Lakes Triathlon - Sunday | triathlon | Canandaigua, NY |