The Delta Mountains or Delta Range are a subrange of the Alaska Range, forming its eastern terminus. The mountains extend about 95 mi 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 6313 mi2. The highest point of the range is Mount Kimball, at 10300 ft. The Delta River originates on the south side of the range, near Paxson, and flows north through the mountains (between the Delta Mountains and the Hayes Range, to the west) to join the Tanana River. It has been designated a National Wild and Scenic River since 1980.