| 15301 | 14 Dec 25 | 2025 Krampus Krawl at Maryland International Raceway 5k/10k | 10K/5K | Mechanicsville, MD |
| 15302 | 27 Sep 25 | 2025 Kokopelli Triathlon | triathlon | Hurricane, UT |
| 15303 | 28 Sep 25 | 2025 Knights Gambit 5k/1.5M | 1M/5K | Charlottesville, VA |
| 15304 | 27 Sep 25 | 2025 Knights Fury Duathlon | triathlon | Honeoye Falls, NY |
| 15305 | 17 Aug 25 | 2025 Kingsbury Club Youth Triathlon | triathlon | Medfield, MA |
| 15306 | 09 Aug 25 | 2025 Kill Creek Park Triathlon & Duathlon | triathlon | Olathe, KS |
| 15307 | 21 Sep 25 | 2025 Kiel Raider Nation Triathlon | triathlon | Kiel, WI |
| 15308 | 19 Jul 25 | 2025 Kids Triathlon - South Bend | triathlon | South Bend, IN |
| 15309 | 28 Sep 25 | 2025 Kids Mission Bay Triathlon Prerace Clinic . . | triathlon | San Diego, CA |
| 15310 | 25 Oct 25 | 2025 Kids Cancer Foundation 5K Walk/Run in memory of Sebastian | 5K | Royal Palm Beach, FL |
| 15311 | 04 Oct 25 | 2025 Kickapoo Reserve Dam Challenge Triathlon | triathlon | La Farge, WI |
| 15312 | 14 Dec 25 | 2025 Key West Triathlon | triathlon | Key West, FL |
| 15313 | 12 Oct 25 | 2025 Keswick 5k/10k | 10K/5K | Keswick, VA |
| 15314 | 11 Oct 25 | 2025 Kenilworth 5k/10k/Half | 10K/13.1/5K | Washington, DC |
| 15315 | 09 Nov 25 | 2025 Kendra's Race ?? . . | triathlon | Santa Barbara, CA |