Denali National Park and Preserve covers more than 6 million acres and features a vast and varied geological landscape. The park protects large portions of the long, arcuate Alaska Range-including Mount McKinley (known as "Denali" "The High One"] in the native Athabaskan language), which has the greatest vertical relief of any mountain on Earth. The active tectonic processes of southern Alaska are still uplifting the mountains along the Denali fault system.