Mount Haku (白山 Haku-san?), or Mount Hakusan, is a potentially active volcano. The stratovolcano is located on the borders of Gifu, Fukui and Ishikawa prefectures in Japan. It is thought to have first been active 300,000 to 400,000 years ago, with the most recent eruption occurring in 1659. Along with Mount Tate and Mount Fuji, it is one of Japan's "Three Holy Mountains" (三霊山 Sanreizan?).
The mountain's tallest peak, Gozengamine (御前峰), is the one that gives the mountain its height of 2,702 m (8,865 ft). Along with Kengamine (剣ヶ峰), which is 2,677 m (8,783 ft), and Ōnanjimine (大汝峰), which is 2,648 m (8,688 ft), the three peaks are considered "Mount Haku's Three Peaks" (白山三峰 Hakusan Sanmine). Mount Bessan and Mount Sannomine are sometimes included and called "Mount Haku's Five Peaks."
Because it is so high, even after the surrounding mountains have lost their snow, Mount Haku still appears white, which is one explanation for the mountain's name, which means "white mountain." It is also the westernmost mountain in Japan that is over 2,000 m (6,562 ft) in height.
The three most used hiking trails are the Kankō Trail (観光新道 Kankō Shinmichi), the Sabō Trail (砂防新道 Sabō Shinmichi) and the Hirase Trail (平瀬道 Hirase-dō). Both the Kankō Trail and the Sabō trail originate in the city of Hakusan, Ishikawa Prefecture, but the Hirase Trail starts from the Ōshirakawa Dam (大白川ダム) in Gifu Prefecture.
Because the area is protected as a national park, very few trails have been made on the mountain. Though the trails listed above are easy enough to hike up and down in one day, other trails can take two or three days because of the uncleared trails and rough terrain.