The car park is next to the turbine house that has a viewing platform. The walkway is a loop and can be completed in either direction. The climb will be less steep if you do it in a clockwise direction. Begin along Pupu Hydro Society’s gravel access road, which winds gently up through young mixed podocarp forest on a spur south of Campbell Creek. There is a lookout point halfway along that provides views east toward Takaka Valley. Along here you will encounter magnificent, tall rimu with epiphytes hanging off. After 2.7 km the road dips down to meet Campbell Creek, where the intake weir diverting flow into the water race is located. The road ends and a footbridge crosses the creek to join the water race. For the next 1.6 km, the walkway runs directly alongside the water race as it contours the hillside. The water is crystal-clear and the hillside is forested in lush native bush. The water race is actually part canal, part aqueduct, with some sections suspended over gullies and steep parts of the hillside. Along the particularly steep sections of the hillside the walkway becomes a boardwalk less than half a metre wide, and overhangs the water race. A guard rail gives protection from the steep drop to the valley below, but caution is required, especially if you have children with you. You will arrive at the penstock where the water race water is piped steeply down to the turbine house, visible 123 m below. The walkway zig-zags back down the hill for another 1.1 km until you return back to where you started at the turbine house. The latter section between the penstock and the turbine house has become quite rutted, and will require care when descending.