Mount Yudono (湯殿山, Yudono-san) is one of the Three Mountains of Dewa in the ancient province of Dewa (modern-day Yamagata Prefecture).

The Yudonosan Shrine, the most holy of the Dewa Sanzan shrines, is located on the mountain.

[1][2] Pilgrims have to enter the shrine itself barefoot, and photography is not allowed.

Due to heavy winter snowfall, the mountain and shrine are inaccessible for long periods of the year.