| 12856 | 01 Sep 25 | South Davis Labor Day Triathlon | Sprint/supersprint triathlon | Bountiful, UT |
| 12857 | 27 Nov 25 | South Davis Thanksgiving Day Races | 5K/10K | Bountiful, UT |
| 12858 | 06 Dec 25 | South Florida Craft Beer 5K | 5K | Miami, FL |
| 12859 | 30 Aug 25 | South Fork Alder Ass Race | 3M/11M | South Fork, CO |
| 12860 | 13 Sep 25 | South Hills Single Track Trail Run | 5K/10K/9M/13.1M/16M/26.2M/50K | San Jose, CA |
| 12861 | 20 Sep 25 | South Holland Fun Run 5K | 5K | South Holland, IL |
| 12862 | 04 Oct 25 | South Jordan River Run Half Marathon | 13.1M | South Jordan, UT |
| 12863 | 24 Aug 25 | South Lakes 10K | 10K | Reston, VA |
| 12864 | 28 Sep 25 | South Lyon Pumpkinfest Half Marathon | 13.1M | South Lyon, MI |
| 12865 | 07 Sep 25 | South Nyack 10 Miler | 10M | South Nyack, NY |
| 12866 | 01 Nov 25 | South of the Mountain Trail Run | 5K | Bostic, NC |
| 12867 | 28 Sep 25 | South Padre Island Triathlon | Olympic/Sprint Triathlon/Sprint Triathlon Relay | South Padre Island, TX |
| 12868 | 19 Oct 25 | South Park 5K | 5K | South Park, PA |
| 12869 | 06 Dec 25 | South Pasadena Tiger Run | 5K/10K | South Pasadena, CA |
| 12870 | 23 Aug 25 | South Portland Food Cupboard - St. Max 5K Run/Walk | 1K/5K | Scarborough, ME |