Erin Nielsen has 2 recorded races from Madison, South Dakota, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-06-28 | 2025 Tupper Lake Tinman | Ultra Marathon | 4:21:23 | 1 |
| 2023-09-24 | Life Time Chicago Half Marathon + 5K presented by HOKA | Half Marathon | 2:05:22 | 2752 |