The Mariana Trench is the deepest part of the Earth’s ocean and is also the lowest point on the Earth’s crust. It is estimated to be 10,971 m (35,994 ft) deep and is located in the western Pacific Ocean. It reaches a maximum-known depth of about 10.91 kilometres (6.78 mi) at the Challenger Deep, a small slot-shaped valley in its floor, although some unrepeated measurements place the deepest portion at 11.03 kilometres (6.85 mi). If Mount Everest was set in the deepest part of the Mariana Trench, there would be 2,076 metres (6,811 ft) of water left above it.