Piriaka is a small rural settlement beside the Whanganui River, about 10 kilometres (6.2 mi) southeast of Taumarunui on State Highway 4 (SH4), in New Zealand's King Country.
Its name is Māori, from piri (to cling close) and aka (bush climbers of various kinds, such as rata).
[1] The Piriaka Power Station is about 1 kilometre (0.62 mi) north of the settlement.
These springs are well known in the local area, and also provide the main water supply for the settlement.
[2][3] About 1 kilometre (0.62 mi) further south along SH4, at 38°55′56″S 175°20′37″E / 38.93222°S 175.34361°E / -38.93222; 175.34361 (Piriaka lookout), there is a lookout providing an excellent view of the Whanganui River.