The 89.35 km (55.5 mile) branch line from Lleida to La Pobla de Segur climbs into the southern reaches of the Pyrenees, and is astonishingly scenic. On summer sundays it is possible to make the journey along it on the “Tren dels Llacs” behind a pair of classic former RENFE diesel locomotives, operated by the FGC. These are of Class 308, a single-cab four-axle diesel-electric loco type built by General Electric and Babcock & Wilcox in the late 1960s, each powered by a 710hp Caterpillar D398 lump. The machines in charge will chosen from 10817 (308 017), 10820 (308 020) and 10838 (308 038) – from the ARMF (Associació per a la Reconstrucció de Material Ferroviari Históric) at Lleida. The "Tren del Llacs" is ready for departure from Lleida with locomotives # 10838 (308-038) and # 10817 (308-017) built in 1968/69 in Bilbao.
