The line starts from the Saint Lieux-lès-Lavaur terminus at the former station ex-TVT and follows the streets of Saint-Lieux till a 132-metre (433 ft) long viaduct over the river Agout.

Then it runs in the Tarn countryside and woods before arriving at the present terminus at les Martels.

The Tarn Light Railway is operating from begin of April to the end of October, on Sundays and holidays, and every day of the week in July and August.

The trains perform a one-hour travel between the Saint-Lieux station and the Les Martels terminus.

"Tramways a Vapeur du Tarn" (English Language) Author - Sarah Wright, Publisher - The Oakwood Press ISBN 0 85361 570 5