Leiff Clarkson has 4 recorded races from Miami, Florida, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-01-25 | Life Time Miami Marathon & Half presented by FP Movement | Marathon | 3:53:20 | 550 |
| 2025-02-02 | Life Time Miami Marathon & Half presented by FP Movement | Marathon | 3:49:38 | 402 |
| 2024-11-28 | 2024 Life Time Turkey Trot Miami 5K/10K & Kids Race | 10K | 41:44 | 43 |
| 2022-11-24 | Baptist Health Turkey Trot Miami 5K / 10K 10K Run | 10K | 47:01 | 102 |