Siobhan O'Sullivan has 4 recorded races from Killingworth, Connecticut, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-03-15 | O'Hartford 5K &10K | 5K | 41:36 | 683 |
| 2026-03-14 | O'Niantic 5K | 5K | 44:08 | 823 |
| 2026-03-08 | Courthouse O'Putnam 5K | 5K | 43:47 | 800 |
| 2025-03-15 | O'Niantic 5K | 5K | 43:25 | 831 |