Bolagen (Southern Sami: Båålege) is a lake in the municipality of Røros in Trøndelag county, Norway. The 2.5-square-kilometre (0.97 sq mi) lake is located about 4.5 kilometres (2.8 mi) southeast of the village of Brekken and about 4 kilometres (2.5 mi) west of the border with Sweden. The large lake Aursunden lies about 4 kilometres (2.5 mi) to the west of Bolagen.

• List of lakes in Norway