Challenger Deep's Nearest Coast: Guam, 300 Kilometers Away

Challenger Deep, the deepest known point in the Mariana Trench (~10,925 m), lies in the western Pacific Ocean.

Proximity

• ~11 km (6.8 mi) southeast of the Mariana Islands
• Nearest coast: Guam, ~300 km (186 mi) to the northeast

Guam is a U.S. territory and the closest landmass to Earth’s deepest ocean point.