Brian Mathieson has 10 recorded races from Mercer, Pennsylvania, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-03-28 | Sean T. Smith Memorial Just a Short Run 1/2 Marathon | Half Marathon | 2:28:36 | 117 |
| 2026-02-28 | 50th Annual Spring Thaw 10 mile | 10 Mile | 1:51:46 | 137 |
| 2025-03-29 | 25th Annual Sean T. Smith Memorial Just a Short Run 1/2 Marathon | Half Marathon | 2:25:53 | 154 |
| 2024-12-10 | Twas the Night Before 5K | 5K | 39:07 | 343 |
| 2024-03-23 | 24th Annual Sean T. Smith Memorial - Just A Short Run 1/2 Marathon | Half Marathon | 2:07:31 | 95 |
| 2024-03-09 | March Mad Dash 10 Mile | 10 Mile | 1:33:51 | 19 |
| 2024-02-24 | 48th Annual Spring Thaw 10 mile | 10 Mile | 1:35:24 | 93 |
| 2023-12-05 | Twas the Night Before 5K | 5K | 31:09 | 193 |
| 2023-03-25 | 23rd Annual Sean T. Smith Memorial - Just A Short Run 1/2 Marathon | Half Marathon | 1:58:02 | 60 |
| 2023-01-08 | 2023 Frigid 5 Miler | 43:32 | 92 |