Rough Basic outline: Starting from Moumoukai Car park. Walk up Lilburne Road (past Upper Mangatawhiri Dam), Turn right onto Pukapuka Track. Walk up to Mangatangi Trig, Then walk down Mangatangi Trig Track and return back to car via network of gravel road.
If necessary, can cut this short by going down A.R.A Road.
Alternative shorter southern loop plan: Go up A.R.A Road, down Mangatangi Trig Track and back to car park via the network of roads.
Estimated Time: 8-10 Hours (Depending on pace, including allowances for stops)