Mark Nielsen has 3 recorded races from Portland, OR.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-03-15 | 2026 St. Patrick's Parade Corktown Races 5K Run/Walk | 5K | 37:12 | 1484 |
| 2025-10-05 | 2025 Portland Marathon Half Marathon | Half Marathon | 1:56:57 | 1322 |
| 2023-09-23 | JWR Protect and Serve Run 10K | 10K | 1:04:53 | 6 |