Lozen Mountain (Bulgarian: Лозенска планина, Lozenska planina) is a small mountain range in Bulgaria.

It is at the westernmost end of the Sredna Gora range.

To the west, it is separated by the Pancharevo Gorge from the Vitosha and Plana mountains.

To the north, its foothills descend into the Sofia Valley.

Its highest point is Popov Dyal, 1,190.2 metres (3,905 ft).