| 481 | 19 Jul 25 | 2025 Habitat Pittsburgh's Kids Triathlon - North Park | triathlon | Allison Park, PA |
| 482 | 06 Jul 25 | 2025 Hagerstown Sprint Triathlon - SUNDAY | triathlon | Hagerstown, MD |
| 483 | 12 Jul 25 | 2025 Hagg Lake Triathlon & Trail Festival . . | triathlon | Gaston, OR |
| 484 | 26 Oct 25 | 2025 Halloween Horror 5k/10k | 10K/5K | Gainesville, VA |
| 485 | 12 Jul 25 | 2025 Hammerman Off-Road Triathlon & Duathlon | triathlon | Anchorage, AK |
| 486 | 12 Jul 25 | 2025 Hamptons Youth Triathlon . . | triathlon | Sag Harbor, NY |
| 487 | 26 Jul 25 | 2025 Handcart Days Races | 1K/5K | Bountiful, UT |
| 488 | 05 Jul 25 | 2025 Hannibal Cannibal | 5K/10K/15K | Hannibal, MO |
| 489 | 28 Jun 25 | 2025 Happy Birthday To Me 2025- Benefitting Make a Wish Foundation | 10K/13.1/1M/26.2/5K/Triathlon/Ultra | Omaha, NE |
| 490 | 11 Jul 25 | 2025 Hartford Nationals conducted by Move United . . | triathlon | Grand Rapids, MI |
| 491 | 15 Nov 25 | 2025 Harvest Hare Multisport Races | triathlon | Broomall, PA |
| 492 | 18 Oct 25 | 2025 Harvest Hills 5k/10k/Half | 10K/13.1/5K | Lorton, VA |
| 493 | 02 Nov 25 | 2025 Harvest Hustle 5k/10k | 10K/5K | North Garden, VA |
| 494 | 12 Jul 25 | 2025 Hayden Sprint Triathlon . . | triathlon | Hayden, ID |
| 495 | 09 Aug 25 | 2025 Healthy Buffalo Kids Tri . . | triathlon | Grand Island, NY |