Overall Course Records:
Steve Boyd ran the 2003 GTBR in 45:14.
Helen Cooper ran the 1982 GTBR in 54:36.
| Age Group | Name | Time | Year |
| Overall | Steve Boyd | 45:14 | 2003 |
| Under 20 | Steve Findlay | 48:45 | 1975 |
| 20-29 | Doug Scorrar | 45:30 | 1976 |
| 30-39 | Steve Boyd | 45:14 | 2003 |
| 40-49 | Larry McCloskey | 48:48 | 1995 |
| 50-59 | Ben Johns | 52:56 | 1990 |
| 60-69 | Chris Jermyn | 57:05 | 2001 |
| 70 and over | Chris Jermyn | 67:25 | 2014 |
| Age Group | Name | Time | Year |
| Overall | Helen Cooper | 54:36 | 1982 |
| Under 20 | Lynn Parrington | 60:02 | 1986 |
| 20-29 | Helen Cooper | 54:36 | 1982 |
| 30-39 | Nancy Morrison | 55:46 | 1995 |
| 40-49 | Jennifer McDonnell | 56:33 | 1996 |
| 50-59 | Paula Wiltsie | 57:31 | 2017 |
| 60-69 | Deborah Holtom | 72:29 | 2014 |
| 70 and over | Martina McGinn | 90:25 | 2015 |
