Mount Jumullong Manglo (sometimes shortened to Mount Jumullong) is a peak in the south-west of the island of the United States territory of Guam. Rising to above sea level, it is the 2nd highest peak in Guam (after Mount Lamlam, and before Mount Bolanos). Nearby is located the village of Agat (). References Bendure, G. & Friary, N. (1988) Micronesia:A travel survival kit. South Yarra, VIC: Lonely Planet. Mountains of Guam