| 841 | 07 Sep 25 | Tulsa Triathlon | Olympic/Sprint Triathlon/Sprint Triathlon Relay | Barnsdall, OK |
| 842 | 07 Sep 25 | Bootlegger Triathlon | Triathlon | Dawsonville, GA |
| 843 | 07 Sep 25 | 2025 Rose City Triathlon | triathlon | Whitehouse, TX |
| 844 | 08 Sep 25 | 2025 Wisconsin ANVIL Ultra Triathlon | triathlon | Dousman, WI |
| 845 | 08 Sep 25 | Wisconsin ANVIL Ultra Triathlon | ultra duathlon/ultra triathlon/ultra triathlon relay | Dousman, WI |
| 846 | 09 Sep 25 | 2025 Dragon Trails Triathlon | triathlon | Lake Orion, MI |
| 847 | 10 Sep 25 | Brick Endurance Summer Triathlon Series | Sprint Triathlon | Durham, NC |
| 848 | 13 Sep 25 | Harvest Moon Long Course Triathlon | half duathlon/half triathlon | Boulder, CO |
| 849 | 13 Sep 25 | Toughman Triathlon | Half/Olympic/Sprint Triathlon/aquathon | Stony Point, NY |
| 850 | 13 Sep 25 | TOUGHKids Championship Triathlon | youth triathlon | Stony Point, NY |
| 851 | 13 Sep 25 | Desert's Edge Triathlon | Olympic/Sprint Triathlon | Fruita, CO |
| 852 | 13 Sep 25 | 2025 Zuma Beach Triathlon | triathlon | Malibu, CA |
| 853 | 13 Sep 25 | 2025 Tri the Parks John Tanner 2 Sprint (Fall) | triathlon | Carrollton, GA |
| 854 | 13 Sep 25 | 2025 TRI PTC - Peachtree City Sprint Triathlon | triathlon | Peachtree, GA |
| 855 | 13 Sep 25 | The 2025 Gravel X Triathlon | triathlon | Granite Bay, CA |