Puy de Massebœuf, Mountain summit in Cantal, France.

The Puy de Massebœuf is a mountain peak reaching 1,395 meters within the Monts du Cantal range and overlooks the valleys of Alagnon and Cère. Two chairlifts serve the mountain: Prairie des Sagnes from the resort center and Massebœuf from Font d'Alagnon station.

In the 19th century, construction of France's first road tunnel beneath the mountain set a world record for length, with workers from across Europe spending years on the project. This ambitious undertaking shaped French mining and infrastructure history.

The mountain's name comes from the Auvergne term puy, for a volcanic summit, and Massebœuf. Skiing began on its slopes in the early 20th century, and the first ski lifts were built in the second half of the century for the Le Lioran resort. The chairlift from Font d'Alagnon still carries the name Massebœuf.

The mountain is easily reached by either of two chairlifts and offers straightforward access regardless of which route you choose. Visitors should prepare for changing mountain weather and bring appropriate clothing.

The first road tunnel pierced beneath the puy de Massebœuf in the 19th century was then the longest in the world, and travellers came to Le Lioran to see what some called the eighth wonder of the world. A second, railway tunnel, the highest in France, followed; the 2007 tunnel replaced the first road passage, judged too dangerous for today's traffic.