Lake Towerrinning or Towerrinning Lake is a permanent brackish lake in the Wheatbelt region of Western Australia located approximately 32 km (20 mi) south of Darkan, 44 km (27 mi) south west of Wagin and about 245 km (152 mi) south east of Perth. The lake is managed by the Department of Parks and Wildlife since it is used as a recreational facility; the Shire of West Arthur leases part of it as agazetted water ski area.