Tråen is a village in Rollag Municipality, in Buskerud, Norway. Tråen lies at 610 m above sea level, in the Holtefjell mountains. The nearest city is Kongsberg, 43 km to the southeast. Among the landmarks around are Rollag Stave Church (1.6 km), Flesberg Stave Church (18.7 km) and Blaafarveværket (35 km). Among the natural features are Borofjell (9.6 km).