The Jungfrau Railway is a mountain railway in the Bernese Alps, connecting Kleine Scheidegg in the Bernese Oberland to the Jungfraujoch, across the Valais border. The railway, which uses a 1,000 mm metre gauge and racks, runs 9 kilometres from the station of Kleine Scheidegg to the Jungfraujoch. It is the highest railway in Switzerland and Europe, the Jungfraujoch being the highest railway station on the continent and well above the perennial snow line. As a consequence, the railway runs essentially within the Jungfrau Tunnel, built into the neighbouring Eiger and Mönch, to protect the line from snow and extreme weather. Another particularity of the Jungfrau Railway is the high elevation of its starting point, at the hub of Kleine Scheidegg, also the highest in Europe.
The Jungfrau Railway got its name from the highest of the three high peaks above it: the Jungfrau, the latter mountain being the initial goal of the project. A lift connecting the summit of the Jungfrau with an underground railway was planned. In 1912, the project finally ended at the Jungfraujoch, the saddle between the Mönch and Jungfrau.