| 166 | 28 Dec 25 | 2025 Terrapin Trot 5k/10k | 10K/5K | Stevensville, MD |
| 167 | 27 Nov 25 | 2025 Thanksgiving Day Races | 1K/5K/10K | Bountiful, UT |
| 168 | 22 Nov 25 | 2025 Thanksgiving Stuffing Stomp 5k/10k | 10K/5K | Washington, DC |
| 169 | 27 Nov 25 | 2025 The Capital Turkey Trot 5k/10k | 10K/5K | Washington, DC |
| 170 | 14 Dec 25 | 2025 Tinsel Triathlon & 5K | triathlon | Hemet, CA |
| 171 | 13 Dec 25 | 2025 Tinsel Trot 5k/10k | 10K/5K | Louisa, VA |
| 172 | 23 Nov 25 | 2025 Trail Blazer 10K - 5K | 5K/10K | Peoria, AZ |
| 173 | 16 Nov 25 | 2025 Tri Hard Triathlon: The Last Splash | triathlon | Huntsville, AL |
| 174 | 28 Feb 26 | 2025 Tritonman Triathlon - Draft Legal Saturday | triathlon | San Diego, CA |
| 175 | 23 Nov 25 | 2025 Turkey Dri Tri ? | triathlon | Oak Brook, IL |
| 176 | 16 Nov 25 | 2025 Turkey Tumble for Autism 5k/10k/Half | 10K/13.1/5K | Washington, DC |
| 177 | 29 Nov 25 | 2025 Ugly Sweater Dash 5k/10k/Half | 10K/13.1/5K | Fairfax Station, VA |
| 178 | 13 Dec 25 | 2025 UHS Mighty Longhorn Band Jolly Run | 5K | Laredo, TX |
| 179 | 28 Nov 25 | 2025 Ultraman World Championships . . | triathlon | Kealakekua, HI |
| 180 | 08 Nov 25 | 2025 Veteran's Day Defenders Dash 5k/10k | 10K/5K | Fairfax Station, VA |