Pourangahau / Mount Robert is a 1,421m high mountain in the Nelson area of New Zealand's South Island.

The partially unsealed Mt Robert Road, just west of the town of Saint Arnaud leads to a car park that is the start of tramping tracks into the Nelson Lakes National Park, and also a 5-hour loop walk up the mountain: The Pinchgut Track zigzags steeply up to near the top of Mt Robert, then continues along a ridge to Bushline Hut, before descending via the more gentle Paddy's Track.

The treeline on the northeastern slopes of Mt Robert is unusually low due to erosion following the loss of the original beech forest by fire in 1887 and subsequent grazing.

Mature beech forest remains on the western and southern sides of the mountain.

In 2005 the rope tows were removed and shifted to the nearby Rainbow Ski Area.