Leif Nielsen has 4 recorded races from Boise, Idaho, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-03-14 | YMCA St. Patrick's Day Run 1 Mile | 1 Mile | 10:59 | 97 |
| 2025-05-18 | St Alphonsus Capitol Classic Full Course - 1 Mile | 1 Mile | 14:54 | 439 |
| 2025-03-15 | YMCA St. Patrick's Day 1 Mile | 1 Mile | 13:28 | 118 |
| 2024-03-16 | St. Patrick's Day Run Leprechaun Loop 1 Mile | 1 Mile | 15:35 | 139 |