The Septemvri–Dobrinishte narrow-gauge line (Bulgarian: теснолинейка Септември – Добринище, tesnolineyka Septemvri–Dobrinishte) is the only operating 760 mm (2 ft 5+15⁄16 in) narrow-gauge line in Bulgaria. It is operated by Bulgarian State Railways (BDŽ). The line is actively used with four passenger trains running the length of the line in each direction per day. The journey takes five hours through the valleys and gorges between Rila, Pirin and Rhodopes.