Howard Grotts has 6 recorded races from Durango, Colorado, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-08-09 | 2025 Life Time Leadville Trail 100 MTB Leadville 100 MTB - Elite Men | Ultra Marathon | 8:32:52 | 56 |
| 2024-08-10 | 2024 Life Time Leadville Trail 100 MTB | Ultra Marathon | 6:20:46 | 13 |
| 2023-09-16 | 2023 Life Time Chequamegon MTB Festival presented by Trek Pro/Elite Chequamegon 40 | Ultra Marathon | 2:03:45 | 13 |
| 2023-08-12 | 2023 Stages Cycling Leadville Trail 100 MTB | Ultra Marathon | 6:11:14 | 5 |
| 2022-09-17 | 2022 Chequamegon MTB Festival Pro/Elite Chequamegon 40 | Ultra Marathon | 2:11:16 | 14 |
| 2022-08-13 | 2022 Stages Cycling Leadville Trail 100 MTB LT100 Pro | Ultra Marathon | 6:16:18 | 3 |