Mark Grassing has 2 recorded races from Lake Worth, Florida, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-01-25 | Life Time Miami Marathon & Half presented by FP Movement | Marathon | 5:15:00 | 2327 |
| 2023-01-28 | Life Time Miami Marathon & Half | Marathon | 5:35:52 | 2258 |