 At highstand Lake Suguta had a roughly rectangular shape with the long side trending north-northeast from Emuruangogolak volcano in the south to The Barrier in the north, and between the Loriu Plateau west and Tirr Tirr Plateau east of the valley.The lake covered a total area of and was about deep.The Pliocene-Pleistocene Namarunu volcano formed a peninsula on the western coast, while the Kamuge River valley at the southwestern end of the lake was occupied by a bay.