Lake Rotoiti, Group 4
The mesotrophic Lake Rotoiti is the third-largest in the region, occupying in part an old drainage system from Rotorua basin into the Ōkataina Volcanic Centre (Haroharo Caldera).
The lake deepens from west to east, changing from an average of 10 m deep to a maximum of 125m. Geothermal activity is centred around a deep lake vent in the eastern portion of Lake Rotoiti known as Centre Basin. The basin has formed where margin of the Haroharo Caldera crosses the lake from Ruato bay to Puketapu Point. The eastern arm of Lake Rotoiti occupies the caldera moat.
Manupirua pools.