The Mariana Trench reaches 1,580 miles and 2,550 kilometers and a maximum width of 69 kilometers or 43 miles. The maximum known depth is 10,984 meters or 36,037 feet. The water pressure at the bottom of the trench is incredible, more than 1,071 times the normal atmospheric pressure at sea level.

A 2021 estimate using pressure sensors found the deepest spot in Challenger Deep was 35,876 feet (10,935 m). Other modern estimates vary by less than 1,000 feet (305 m). The ocean's.

Mariana Trench Facts. The Mariana Trench gets its name from the nearby archipelago known as the Mariana Islands. The islands are in turn named after Mariana of Austria (1634–1696), the second wife of King Philip of Spain. Mariana's given name was Maria Anna, but this was changed to the Spanish form when she became Queen.

The Mariana Trench deepest point the Challenger Deep was named after the H.M.S Challenger ship. In 1951, the H.M.S Challenger II ship returned with an echo sounder and measured a depth of about 11 kilometers. Only two humans in history have descended into the Challenger Deep depths.