| Robert Marks's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2022 Sawatch Ascent 50k | Colorado, US | 29 | Sunday, September 25, 2022 | 08:08:02.00 |
| 2019 Silverton Ultra Marathon (55K) | Colorado, US | 26 | Saturday, August 3, 2019 | 10:47:01.00 |
| Robert Marks's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2022 Sawatch Ascent 50k | Colorado, US | 29 | Sunday, September 25, 2022 | 08:08:02.00 |
| 2019 Silverton Ultra Marathon (55K) | Colorado, US | 26 | Saturday, August 3, 2019 | 10:47:01.00 |