The deepest part of the ocean is the Challenger Deep, located in the Mariana Trench in the western Pacific Ocean. Its maximum known depth is approximately 10,984 meters (about 36,037 feet or 6.8 miles) below sea level

. Some measurements vary slightly, with depths reported between about 10,903 meters to 11,034 meters, but the generally accepted depth is around 10,984 meters

. The Mariana Trench itself is a crescent-shaped trench about 2,550 km long and 69 km wide, and the Challenger Deep is a small slot-shaped valley at its southern end

. The pressure at this depth is over 1,000 times the atmospheric pressure at sea level, and temperatures range from 1 to 4 °C (34 to 39 °F)

. Only a few people have descended to this extreme depth, with the first manned descent in 1960 by Jacques Piccard and Don Walsh, and filmmaker James Cameron making a solo dive in 2012

. In summary, the deepest part of the ocean is about 10,984 meters (nearly 11 kilometers or 6.8 miles) deep at the Challenger Deep in the Mariana Trench.