| 541 | 19 Oct 25 | 2025 Miami Kids Triathlon - October | triathlon | Miramar, FL |
| 542 | 30 Aug 25 | 2025 Middle Tyger YMCA Sprint Triathlon | triathlon | Duncan, SC |
| 543 | 14 Sep 25 | 2025 Mighty Mississenewa Triathlon | triathlon | Peru, IN |
| 544 | 16 Aug 25 | 2025 Mighty Moraine Fall Multi Sport Festival - SATURDAY EVENTS | triathlon | Portersville, PA |
| 545 | 04 Oct 25 | 2025 Miles for Mammograms 5k/10k | 10K/5K | Sterling, VA |
| 546 | 24 Aug 25 | 2025 Millerton Madness Triathlon | triathlon | Friant, CA |
| 547 | 13 Sep 25 | 2025 Mini Maniac Youth Triathlon . . | triathlon | Shirley, NY |
| 548 | 15 Nov 25 | 2025 Miriam's Kitchen 5k/10k | 10K/5K | Washington, DC |
| 549 | 12 Oct 25 | 2025 Mission Bay Triathlon | triathlon | San Diego, CA |
| 550 | 27 Jul 25 | 2025 Mission Fitness Tumbleweed Triathlon | triathlon | Odessa, TX |
| 551 | 24 Dec 25 | 2025 Mistletoe Madness 5k/10k | 10K/5K | Arlington, VA |
| 552 | 27 Jul 25 | 2025 MoCo Girls on the Run 5k & 10k | 10K/5K | Silver Spring, MD |
| 553 | 24 Aug 25 | 2025 Mojo Triathlon | triathlon | West Chester, OH |
| 554 | 11 Oct 25 | 2025 Monster Kids Triathlon . . | triathlon | Keller, TX |
| 555 | 31 Oct 25 | 2025 Monster Mash 1M, 5K, 10K, 13.1, 26.2 | 10K/13.1/1M/26.2/5K/Triathlon/Ultra | Birmingham, AL |