[1] Its steep slopes have earned it the reputation of being one of the most difficult and technically most challenging mountains to climb in the Philippines.

The first documented ascent was made in 1906 by American botanist Elmer Drew Merrill and a party of forestry and military personnel.

[3] Its thick vegetation contains much flora and fauna, including the critically endangered Mindoro bleeding-heart which is endemic to the area,[4] and the stick insect Conlephasma enigma, which was first described in 2012.

Isao Miyazawa found evidence that his comrade Captain Fumio Nakahara was living there in 1957.

[7] In 1980, Miyazawa found Nakahara's hut, and the natives talked to him extensively about the foreigner.