Wolchulsan (월출산) is a mountain located in South Jeolla province, South Korea; and spans both Gangjin and Yeongam counties.

At its peak, Cheonhwangbong, it rises to 808.7 meters, making it the highest point in Gangjin County.

It lies in a national park of the same name.

Wolchulsan National Park is the smallest national park of South Korea, with an area of 41 square kilometres (16 sq mi).

A notable feature of the mountain is the "Cloud Bridge" (구름다리) a small suspension bridge that spans two peaks.