Where is the deepest point of the ocean? It’s in the Mariana Trench in the Pacific. The Mariana Trench is a deep trench located where two tectonic plates meet, and its deepest point is called Challenger Deep. The bottom of Challenger Deep is over ten thousand meters below sea level. That’s nearly seven miles deep - enough to fit Mount Everest with over a mile to spare. Challenger Deep was first discovered in 1875, but it took nearly a hundred years for it to be explored underwater - at that dept