Mount Lamlam (meaning lightning in Chamoru) is a peak on the United States island of Guam. It is located near the village of Agat ( north), in the south-west of the island. Rising to above sea level, the distance from the peak to the bottom of the nearby Mariana Trench is said to be the greatest change in elevation on Earth over such a short distance. See also List of mountain peaks of the United States List of U.S. states by elevation References Bendure, G. & Friary, N. (1988) Micronesia:A travel survival kit. South Yarra, VIC: Lonely Planet. External links "Mount Lamlam". PeakBagger.com "Mount LamLam". SummitPost.org National Natural Landmarks in Guam Mountains of Guam