Lake Rosebery is a man-made water reservoir located in the West Coast region of Tasmania, Australia. The lake is situated within the northern part of Tasmania's West Coast Range and is fed by the dammed Mackintosh and Murchison rivers.

Location and features

The Bastyan Dam across the Pieman River was built by the Hydro-Electric Commission in 1983. The dam created a 123520 ML reservoir, called Lake Rosebery, with a surface area ranging from 744 ha, drawn from a catchment area of 1397 km2. The lake is located near the village of. The diverted Emu Bay Railway line and the Wee Georgie Wood Railway line run close to the lake.