| 541 | 01 Mar 26 | 2026 Shelbyville Triathlon Series - Race #1 | triathlon | Shelbyville, KY |
| 542 | 29 Mar 26 | 2026 Shelbyville Triathlon Series - Race #2 | triathlon | Shelbyville, KY |
| 543 | 14 Feb 26 | 2026 Shelter Dog Dash 5K and 1M | 5K | Gilbert, AZ |
| 544 | 28 Mar 26 | 2026 Shoreline Sharks 3 Half Marathon Entry | Half Marathon | West Haven, CT |
| 545 | 26 Nov 26 | 2026 Shoreline Turkey Trot 5K | 5K | West Haven, CT |
| 546 | 04 Apr 26 | 2026 Silver Moon Race: Kings River | Ultra | Reedley, CA |
| 547 | 31 May 26 | 2026 Silver Serpent Multisport Festival - Sunday Events | triathlon | Silver Lake, NY |
| 548 | 02 May 26 | 2026 Siouxperman Triathlon | triathlon | Sioux Center, IA |
| 549 | 18 Apr 26 | 2026 Sip & Stride 5k/10k | 10K/5K | Louisa, VA |
| 550 | 18 Apr 26 | 2026 Sky Rim Duathlon | triathlon | Durango, CO |
| 551 | 02 May 26 | 2026 Smith Mountain Lake SPRINT Triathlon | triathlon | Huddleston, VA |
| 552 | 11 Apr 26 | 2026 Smithfield Sprint Triathlon | triathlon | Smithfield, VA |
| 553 | 08 Mar 26 | 2026 Smoketown Brewery 5k/10k | 10K/5K | Brunswick, MD |
| 554 | 03 Jan 26 | 2026 Snowball Dash 5k/10k | 10K/5K | Berryville, VA |
| 555 | 23 May 26 | 2026 Soldier Field 10 | 10K | Chicago, IL |