The Hurunui can be accessed above the
gorge from the Lake Sumner Road. To reach this road, turn
west at Waikari (signposted), travel through Harwarden and
over a small pass.
The Lake Sumner Road comes down right
next to the river in a number of places. When the river splits
into a north and south branch, the Lake Sumner Road follows
the north branch as far as the Sister's Stream.
North Branch Headwaters
There is then unrestricted 4WD road
access along Sister's Stream, past Lake Taylor as far as Loch
Katrine. Half way along Loch Katrine there is a locked gate. You can park at the gate and then walk (or bike) from there.