The line runs along the valley of the River Mur, from the market town of Unzmarkt through Murau to Tamsweg, which is just over the Styrian border in the state of Salzburg.
On 9 July 2021, railcar VT 32 was derailed due to a fallen tree, with one carriage ending up on its side in the Mur.
In the summer months, the STLB operates weekend steam-hauled services between Murau, where the main workshop are, and Tamsweg.
Goods trains still operate on the railway, hauled by diesel locomotives VL 14 and 15, built in 1966.
There are good positions for photography by railway enthusiasts along the whole route, particularly in the valley between Madling and Tamsweg.