| 10036 | 07 Jun 26 | Kolor Run 5K | 5K | North Brunswick, NJ |
| 10037 | 26 Jul 26 | Koloa Plantation Days Family Fun Run | 5K/10K | Koloa, HI |
| 10038 | 26 Jul 26 | Kolacky Days 5K Bun Run | 2M/5K | Montgomery, MN |
| 10039 | 12 Sep 26 | Kolache Krunch 5K | 5K | Caldwell, TX |
| 10040 | 26 Jun 26 | Kokosing Alberici Traylor Engineers Day 5K | 5K | Sault Sainte Marie, MI |
| 10041 | 26 Sep 26 | Kokopelli Triathlon | Olympic/Sprint Duathlon/Sprint Triathlon | Hurricane, UT |
| 10042 | 26 Sep 26 | Kokopelli Run | 5K/10K | Hurricane, UT |
| 10043 | 13 Jun 26 | Kohler Classic | 1M/5K | Kohler, WI |
| 10044 | 07 Nov 26 | KofC Tootsie Roll 5K | 1M/5K | Madison, AL |
| 10045 | 09 Oct 26 | Kodiak Ultra Marathons | 100M | Big Bear Lake, CA |
| 10046 | 17 Oct 26 | Knox/Whitley Humane Association 5K Mutt Strut | 1M/5K | Corbin, KY |
| 10047 | 01 May 27 | Knox-Xtreme Adventure Race | 30H/8H adventure race | Knoxville, TN |
| 10048 | 07 Jun 26 | Knox County Triathlon, Duathlon and Super Triathlon | Other/Sprint Duathlon/Sprint Triathlon | Vincennes, IN |
| 10049 | 12 Sep 26 | Knox County Suicide Prevention 10K/5K Run | 5K/10K | Mount Vernon, OH |
| 10050 | 20 Jun 26 | Knockout for Pizza 5K | 5K | Wharton, NJ |