| Mark Byers's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| ABC 50 (Anza Borrego 50) | California, US | 43 | Saturday, December 2, 2023 | 13:15:47.00 |
| The Peak 2023 (Half Marathon) | California, US | 43 | Saturday, July 15, 2023 | 03:28:00.00 |
| Mark Byers's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| ABC 50 (Anza Borrego 50) | California, US | 43 | Saturday, December 2, 2023 | 13:15:47.00 |
| The Peak 2023 (Half Marathon) | California, US | 43 | Saturday, July 15, 2023 | 03:28:00.00 |