The eastern terminus of Grand Junction Road is in the suburb of Hope Valley, at the intersection of Hancock Road and Lower North East Road, just before the latter proceeds into the Adelaide Hills, past a park managed by a what volunteer group? 
Grand Junction Road: Grand Junction Road is the longest east–west thoroughfare in the Adelaide metropolitan area, and is located approximately 9 kilometres north of the city centre. Grand Junction Road:  The eastern terminus of Grand Junction Road is in the suburb of Hope Valley, at the intersection of Hancock Road and Lower North East Road, just before the latter proceeds into the Adelaide Hills, past Anstey Hill Recreation Park and on towards the towns of Houghton and Inglewood. Anstey Hill Recreation Park: Anstey Hill Recreation Park is a 362 ha protected area established in 1989 and located approximately 19 km northeast of Adelaide, South Australia. Anstey Hill Recreation Park:  It is managed by the City of Tea Tree Gully, the Department of Environment, Water and Natural Resources and a volunteer group—The Friends of Anstey Hill.
The Friends of Anstey Hill