Charles Marks has 3 recorded races from Boulder, CO.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2024-09-29 | Boulderthon Marathon | Marathon | 4:54:30 | 765 |
| 2023-02-04 | 2023 Mesa Marathon | Marathon | 4:26:18 | 1262 |
| 2022-02-20 | 2022 Lost Dutchman Marathon, Half Marathon, 10K and 8K | Half Marathon | 1:57:31 | 152 |