Ticlio, mountain pass of the Cordillera Central of the Peruvian Andes, about 60 miles (100 km) northeast of Lima. Through its highest part—La Cima, at an elevation of 15,807 feet (4,818 metres)—passes a branch line of the highest standard-gauge railway in the world. The railroad was built to service the lead and zinc mines at La Oroya and Morococha. The railroad’s main line accesses the pass from Ticlio station, which is reached from the west via the Galera Tunnel, 3,855 feet (1,175 metres) in length.