 It has at its centre the 14.6 kilometre-long Lötschberg (Culmination) Tunnel, with portals in Kandersteg (BE) and Goppenstein (VS).It culminates at a height of 1,240 metres and is the highest railway on the main Swiss network.The second line uses, since 2007, the 34.6 kilometre-long Lötschberg Base Tunnel, which has its portals in Frutigen (BE) and Raron (VS).