| 2566 | 27 Sep 25 | South Shore "3 Beach Minimum" Half Marathon 2025 | Half Marathon | Hull, MA |
| 2567 | 28 Sep 25 | South Seas Captiva Island Triathlon | Sprint/Sprint Duathlon/Sprint Triathlon Relay/supersprint triathlon | Captiva, FL |
| 2568 | 06 Dec 25 | South Riding Jingle Bell Dash | 1M/5K/10K | South Riding, VA |
| 2569 | 23 Aug 25 | South Portland Food Cupboard - St. Max 5K Run/Walk | 1K/5K | Scarborough, ME |
| 2570 | 06 Dec 25 | South Pasadena Tiger Run | 5K/10K | South Pasadena, CA |
| 2571 | 19 Oct 25 | South Park 5K | 5K | South Park, PA |
| 2572 | 28 Sep 25 | South Padre Island Triathlon | Olympic/Sprint Triathlon/Sprint Triathlon Relay | South Padre Island, TX |
| 2573 | 01 Nov 25 | South of the Mountain Trail Run | 5K | Bostic, NC |
| 2574 | 07 Sep 25 | South Nyack 10 Miler | 10M | South Nyack, NY |
| 2575 | 28 Sep 25 | South Lyon Pumpkinfest Half Marathon | 13.1M | South Lyon, MI |
| 2576 | 24 Aug 25 | South Lakes 10K | 10K | Reston, VA |
| 2577 | 04 Oct 25 | South Jordan River Run Half Marathon | 13.1M | South Jordan, UT |
| 2578 | 20 Sep 25 | South Holland Fun Run 5K | 5K | South Holland, IL |
| 2579 | 13 Sep 25 | South Hills Single Track Trail Run | 5K/10K/9M/13.1M/16M/26.2M/50K | San Jose, CA |
| 2580 | 30 Aug 25 | South Fork Alder Ass Race | 3M/11M | South Fork, CO |