| Lago Musters | |
|---|---|
| Otrón | |
 | |
| Coordinates | 45°24′36″S 69°11′24″W / 45.41000°S 69.19000°W |
| Part of | Now endorheic, exceptionally by the Chico River |
| Primary inflows | Senguerr River |
| Primary outflows | Endorheic |
| Surface area | 342 km2 (132 sq mi) |
| Average depth | 15 m (49 ft) |
| Max. depth | 38.5 m (126 ft) |
| Water volume | 8.28 km3 (2 cu mi) |
| Surface elevation | 271 m (889 ft) |
| Settlements | Colonia Sarmiento |
Lake Musters is located in the central Patagonian region of the Argentine Republic, south of the province of Chubut, and together with Lake Colhué Huapi forms the terminal phase of the current endorheic basin of the Senguerr River. Both lakes are located in the Valle de Sarmiento.
Their flow is used to supply drinking water to the towns of Comodoro Rivadavia, Colonia Sarmiento, Rada Tilly and Caleta Olivia. Sport and commercial fishing is also practised in its waters.