| Clifford Matthews's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2021 | New Mexico, US | 58 | Friday, July 16, 2021 | 43:50:00.00 |
| Bighorn 100M 2014 | New Mexico, US | 51 | Friday, June 20, 2014 | 32:45:03.42 |
| Clifford Matthews's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2021 | New Mexico, US | 58 | Friday, July 16, 2021 | 43:50:00.00 |
| Bighorn 100M 2014 | New Mexico, US | 51 | Friday, June 20, 2014 | 32:45:03.42 |