Walk approximately 8 km up the Kawhatau River. The track to McKinnon Hut begins on the true left of the river with a steep climb up the ridge. This eventually takes you to the tussock tops of the Hikurangi Range. Continue past the turnoff to Crow Hut then drop down to McKinnon Hut.
Alternatively, you can make the trip over two days. To do this, continue on in the river for another 1.5 km and spend a night at Kawhatau Base, before crossing the river and heading up the ridge to the McKinnon Hut Track.
Beware, this trip may not be possible during times of high river flow.
Due to travel on the open tops this hike should not be attempted in poor visibility or bad weather.