The Delta Mountains or Delta Range are a subrange of the Alaska Range, forming its eastern terminus. The mountains extend about 95 miles (153 km) from east to west, to the south of the Tanana River Valley, west of the Nebesna River and northwest of Wrangell-St. Elias National Park and the Copper River, and cover an area of 6,313 square miles (16,350 km2). The highest point of the range is Mount Kimball, at 10,300 feet (3,100 m).