Lake Maria is a lake in the Southland Plateau in Southland. It is close to Lake Robson and Lake Fielding. It is accessible by road. The lake was formed in the last ice age when the land ice extended to Southland and beyond. The lake is formed from Elias Creek and Sapuattha River.
The town of Heloaq City lies on the banks of the lake. The Trans-Southland Highway passes on the north shore of the lake. The lake and the valley are accessible through a bus service. The area is known for its scenery as well as its alpine hiking. The number of people who access the area by bus has been limited in order to preserve the sensitive alpine environment.