| 421 | 07 Jun 26 | 2026 Keuka Lake Triathlon | triathlon | Keuka Park, NY |
| 422 | 17 Jan 26 | 2026 Key West Half Marathon and Runfest | 5K | Key West, FL |
| 423 | 08 Aug 26 | 2026 Kill Creek Park Triathlon & Duathlon | triathlon | Olathe, KS |
| 424 | 15 Feb 26 | 2026 Kiss My Asphalt 5k/10k/1M | 10K/1M/5K | Fredericksburg, VA |
| 425 | 25 Jul 26 | 2026 Lake Country Triathlon | triathlon | Oconomowoc, WI |
| 426 | 19 Jul 26 | 2026 Lake Lenape Triathlon | triathlon | Mays Landing, NJ |
| 427 | 17 May 26 | 2026 Lake Lou Yaeger Triathlon | triathlon | Litchfield, IL |
| 428 | 07 Jun 26 | 2026 Lake Mills Triathlon | triathlon | Lake Mills, WI |
| 429 | 19 Apr 26 | 2026 Lake Murray Sprint Triathlon | triathlon | Prosperity, SC |
| 430 | 05 Sep 26 | 2026 Lake Nighthorse Triathlon | triathlon | Durango, CO |
| 431 | 25 Apr 26 | 2026 Lake Norman State Park Sprint Triathlon | triathlon | Troutman, NC |
| 432 | 25 Jul 26 | 2026 Lake Springfield Triathlon | triathlon | Springfield, IL |
| 433 | 11 Jul 26 | 2026 Lake Zurich Triathlon | triathlon | Lake Zurich, IL |
| 434 | 22 May 26 | 2026 Lakeside Double Sprint Triathlon | triathlon | Greenville, SC |
| 435 | 10 Oct 26 | 2026 Las Vegas Triathlon | triathlon | Boulder, NV |