| 10156 | 13 Dec 26 | Key West Triathlon | ['16.6M'/ '9.2M'/ '16.4M'/ '28.6M'/ '12.4M'/ 'Triathlon'/ 'Ultra'] | Key West, FL |
| 10157 | 16 Jan 27 | Key West Half Marathon | 5K/10K | Key West, FL |
| 10158 | 16 Aug 26 | Key Largo Triathlon | Olympic/Sprint Duathlon/Sprint Triathlon/Sprint Triathlon Relay/olympic duathlon relay | Key Largo, FL |
| 10159 | 05 Dec 26 | Key Largo Bridge Run | 5K/10K | Key Largo, FL |
| 10160 | 24 Apr 27 | Kewash Trail Half Marathon | 5K/10K/13.1M/26.2M | Washington, IA |
| 10161 | 25 Jul 26 | Kevin Peck Memorial 5K | 5K | Canal Fulton, OH |
| 10162 | 18 Jul 26 | Keuka Outlet Trail Half Marathon and 10K | 10K/13.1M | Penn Yan, NY |
| 10163 | 07 Jun 26 | Keuka Lake Triathlon | Olympic/Sprint Duathlon/Sprint Triathlon/youth triathlon | Keuka Park, NY |
| 10164 | 13 Jun 26 | Kettle Moraine 100 Endurance Runs | 50K/38M/100K/100M | La Grange, WI |
| 10165 | 15 Aug 26 | Kettle Klomp | 5K | Jackson, WI |
| 10166 | 04 Oct 26 | Kettle Cooker Trail Race | 5M/25K/50K | Nottingham, PA |
| 10167 | 20 Jun 26 | Kettle Classic | 5K | Dousman, WI |
| 10168 | 07 Nov 26 | Kessel Run Ultra | 10M/60K | Fruita, CO |
| 10169 | 11 Jul 26 | Kerstetter 5K | 5K | Elyria, OH |
| 10170 | 26 Sep 26 | Kerrville Triathlon Festival | Sprint Triathlon | Kerrville, TX |