Mountain ranges outside these two systems include the Arctic Cordillera, Appalachians, Great Dividing Range, East Siberians, Altais, Scandinavians, Qinling, Western Ghats, Vindhyas, Byrrangas, and the Annamite Range. If the definition of a mountain range is stretched to include underwater mountains, then the Ocean Ridge forms the longest continuous mountain system on Earth, with a length of .
Mountain ranges outside these two systems include the Arctic Cordillera, Appalachians, Great Dividing Range, East Siberians, Altais, Scandinavians, Qinling, Western Ghats, Vindhyas, Byrrangas, and the Annamite Range. If the definition of a mountain range is stretched to include underwater mountains, then the Ocean Ridge forms the longest continuous mountain system on Earth, with a length of .