| 856 | 17 Jun 26 | Tri Faster SwimRun - Race #1 | 5K | Brookfield, WI |
| 857 | 22 Feb 26 | Tri Faster Indoor Triathlon | indoor triathlon | Greenfield, WI |
| 858 | 12 Apr 26 | Tri Aggieland | Sprint Triathlon | Bryan, TX |
| 859 | 14 Mar 26 | Tri 4 the Cure AZ • 2026 | 5K | Anthem, AZ |
| 860 | 16 May 26 | Tri 4 Schools Waunakee Kids Triathlon | youth triathlon | Waunakee, WI |
| 861 | 13 Jun 26 | Tri 4 Schools Sun Prairie Kids Triathlon | youth duathlon/youth triathlon | Sun Prairie, WI |
| 862 | 20 Jun 26 | Trestle Hustle | 5K/10K | Madrid, IA |
| 863 | 23 May 26 | Trent Waldron Half Marathon | 10K/13.1M | Anchorage, AK |
| 864 | 20 Jun 26 | Tremont Triathlon | Sprint/supersprint triathlon/supersprint triathlon relay | Tremont, IL |
| 865 | 07 Feb 26 | Trek Up The Tower | stair climb | Omaha, NE |
| 866 | 22 Mar 26 | Tree of Life 10K, 5K & Pioneer 1 MIle Race | 5K/10K | Fredericksburg, VA |
| 867 | 02 May 26 | Tree Hugger Trail Run at Goodell Gardens | 5K | Edinboro, PA |
| 868 | 19 Apr 26 | Treat Yo Self | 5K | Cleveland, OH |
| 869 | 06 Jun 26 | Treasure Valley Triathlon | Olympic/Sprint/supersprint triathlon/youth triathlon | Boise, ID |
| 870 | 06 Jun 26 | Treasure Valley Rescue Run | 5K/10K | Eagle, ID |