What is the name of the tallest mountain range in the world?
The distinction between world's tallest mountain range and world's highest mountain range is that tallest mountains include those that are completely or partially submerged. When considering the height of the highest mountains, only the amount above sea level is considered.
Mauna Kea is the world's tallest mountain. It is partially submerged and rise more than 10,000 m (32,808 ft) from the floor of the Pacific Ocean. Mauna Kea is part of the Hawaiian--Emperor seamount chain, which is a chain of mountains and seamounts in the Pacific Ocean. Considering the fact that Mauna Kea is the world's tallest mountain, one would have to conclude that the Hawaiian--Emperor seamount chain is the world's tallest mountain range.
Mt. Everest is the highest mountain in the world, at 29,029 feet. K2, the second highest mountain is also in the Himalayas. A number of other very high mountains are also there. Therefore, the highest mountain range is the Himalayas.