Lake Sumner Forest Park lies 100 km northwest of Christchurch between the Lewis Pass and Arthur’s Pass National Park.
There is a car park by SH 7 – around 5 km further on from Windy Point and 5 km before Boyle Village.
There is no bridge over Boyle River from this access point, but the swingbridge at Windy Point (around 2 hours walk) can be reached via Tui Track if the river cannot be crossed.