Spencer Nielsen has 4 recorded races from Sacramento, California, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2024-03-17 | Shamrock'n Half Marathon 2024 | Half Marathon | 1:57:42 | 674 |
| 2023-12-03 | California International Marathon 2023 | Marathon | 4:48:54 | 7385 |
| 2023-03-12 | Shamrock'n Half Marathon 2023 | Half Marathon | 2:04:32 | 720 |
| 2022-03-13 | Shamrock'n Half Marathon 2022 | Half Marathon | 1:59:10 | 723 |