Lake Baikal in southern Russia is the world's deepest lake. It is an estimated 5,387 feet deep (1,642 meters), and its bottom is approximately 3,893 feet (1,187 meters) below sea level. Lake Baikal is also the world's largest freshwater lake in terms of volume.
It is difficult to comprehend how a lake in the middle of Asia could have a bottom that is nearly 4,000 feet below sea level. It is impossible for erosion to cut a channel that deep in the middle of a continent.
Lake Baikal is so deep because it is located in an active continental rift zone. The rift zone is widening at a rate of about 1 inch (2.5 centimeters) per year. As the rift grows wider, it also grows deeper through subsidence. So, Lake Baikal could grow wider and deeper in the future.
The deepest lake in the United States is Crater Lake, a volcanic crater in southern Oregon. Its deepest measured depth is 1,949 feet (594 meters). It is the ninth-deepest lake in the world.
It is an amazing lake because no rivers flow into it or out of it. The water level in the lake is a balance between rainfall, groundwater flow, and evaporation.
The lake is a volcanic crater that formed about 7600 years ago in the aftermath of one of the largest volcanic eruptions in recent geologic history. The explosive eruption ejected about 150 cubic kilometers of material, then the volcano collapsed into the empty magma chamber below to form a deep basin known as a caldera.