| 15181 | 05 Dec 26 | South Riding Jingle Bell Dash | 5K/10K | South Riding, VA |
| 15182 | 27 Sep 26 | South Seas Captiva Island Triathlon | Sprint/Sprint Duathlon/Sprint Triathlon Relay/supersprint triathlon | Captiva, FL |
| 15183 | 26 Sep 26 | South Shore "3 Beach Minimum" Half Marathon | 13.1 | Hull, MA |
| 15184 | 26 Sep 26 | South Shore 3 Beach Minimum Half Marathon | 13.1M | Hull, MA |
| 15185 | 15 Aug 26 | South Side Run with the Rams 5K | 5K | Hookstown, PA |
| 15186 | 28 Jun 26 | South Suburban Goodson TRYathlon | Sprint Triathlon/youth triathlon | Centennial, CO |
| 15187 | 01 Aug 26 | South Texas Rollers Cross Country Invitational Season Opener | 5K | Corpus Christi, TX |
| 15188 | 17 Oct 26 | South Texas Ultra | ['50K'/ '35K'/ '17K'/ '5K'/ 'Ultra'] | Leakey, TX |
| 15189 | 26 Nov 26 | South Vineland Thanksgiving Run | 3M | Vineland, NJ |
| 15190 | 31 Oct 26 | South West Center City 5K | 1M/5K | Philadelphia, PA |
| 15191 | 05 Jul 26 | Southampton Firecracker 8K | 3M/8K | Southampton, NY |
| 15192 | 02 Aug 26 | Southampton Race of Hope 5K | 1M/5K | Southampton, NY |
| 15193 | 12 Sep 26 | SouthArk Outdoor Expo Hero 5K Run/Walk | 5K | El Dorado, AR |
| 15194 | 05 Sep 26 | Southern Hills Triathlon | Olympic/Sprint Triathlon/Sprint Triathlon Relay/youth triathlon | Hot Springs, SD |
| 15195 | 26 Sep 26 | Southern New Hampshire Health 5K | 5K | Nashua, NH |