how deep is mariana trench

The Mariana Trench is the deepest part of the world's oceans, with its greatest depth located in a small valley called the Challenger Deep. The depth of the Mariana Trench at the Challenger Deep is approximately 10,935 meters (35,876 feet), which is about 7,000 feet deeper than the height of Mount Everest. Other recorded depths range slightly around this figure, from about 10,900 to 11,034 meters (approximately 35,800 to 36,200 feet), depending on measurements from various expeditions and sonar mapping technologies.