| 2776 | 02 May 26 | Diamond Daze 5K | 5K | Sallisaw, OK |
| 2777 | 11 Jul 26 | Diamond in the Rough Triathlon | Olympic/Sprint Triathlon/Sprint Triathlon Relay | Perryville, MD |
| 2778 | 30 May 26 | Diamond Kid | youth triathlon | Blue Diamond, NV |
| 2779 | 26 Apr 26 | Diamond Mountain Duathlon | supersprint duathlon | Stony Point, NY |
| 2780 | 09 May 26 | Diane Keller Kiwanis 5k | 5K | Fort Walton Beach, FL |
| 2781 | 01 Aug 26 | Dick Fitzgerald 2 Mile Beach Run | 2M | Hermosa Beach, CA |
| 2782 | 20 Jun 26 | Dickson Olympic and Sprint Triathlon | Olympic/Sprint Triathlon/Sprint Triathlon Relay | Burns, TN |
| 2783 | 25 Jul 26 | Dickson Street Mile | 1M | Fayetteville, AR |
| 2784 | 16 May 26 | Die to Run - The 5K | 5K | Muskogee, OK |
| 2785 | 18 Apr 26 | Different Not Less - Autism Inclusion 5K | 5K | Charleston, WV |
| 2786 | 16 May 26 | Dillsboro Homecoming Festival 5K | 5K | Dillsboro, IN |
| 2787 | 01 Aug 26 | Dim Sum & Then Some: The Uptown 5K/10K & Kids Dash | 10K/5K | Chicago, IL |
| 2788 | 20 Jun 26 | Dime McCarren 5K | 5K | Brooklyn, NY |
| 2789 | 20 Jun 26 | Dino Dash : Beatty Park 5K Trail Run | 5K | Steubenville, OH |
| 2790 | 01 Aug 26 | DINO Gravel Triathlon | Sprint Duathlon/sprint dry triathlon/sprint offroad triathlon | Terre Haute, IN |