| 271 | 27 Sep 25 | 2025 Knights Fury Duathlon | triathlon | Honeoye Falls, NY |
| 272 | 28 Sep 25 | 2025 Knights Gambit 5k/1.5M | 1M/5K | Charlottesville, VA |
| 273 | 27 Sep 25 | 2025 Kokopelli Triathlon | triathlon | Hurricane, UT |
| 274 | 14 Dec 25 | 2025 Krampus Krawl at Maryland International Raceway 5k/10k | 10K/5K | Mechanicsville, MD |
| 275 | 04 Oct 25 | 2025 LA Tri Series Triathlon & Duathlon | triathlon | San Dimas, CA |
| 276 | 28 Nov 25 | 2025 Lake Anna Turkey Trot 5k/10k/Half | 10K/13.1/5K | Spotsylvania, VA |
| 277 | 19 Oct 25 | 2025 Lake Hodges Off-Road Duathlon | triathlon | San Diego, CA |
| 278 | 27 Nov 25 | 2025 Lansdowne Turkey Trot | 1k/5K | Leesburg, VA |
| 279 | 04 Oct 25 | 2025 Las Vegas Triathlon | triathlon | Boulder, NV |
| 280 | 05 Oct 25 | 2025 Last Chance Tri - Mattoon | triathlon | Mattoon, IL |
| 281 | 16 Nov 25 | 2025 Last Chance Triathlon | triathlon | St Petersburg, FL |
| 282 | 12 Oct 25 | 2025 Lighthouse Lookout 5k/10k | 10K/5K | Scotland, MD |
| 283 | 03 Oct 25 | 2025 Lititz recCenter Youth Triathlon | triathlon | Lititz, PA |
| 284 | 28 Sep 25 | 2025 Little Hurt Kids Triathlon - Sunday | triathlon | Port Angeles, WA |
| 285 | 04 Oct 25 | 2025 Long Beach Marathon & Half Marathon | 5K | Long Beach, CA |