North America's roof lost ten feet in a 2015 remeasure
Denali—federally also Mount McKinley—tops North America at 20,310 feet after a 2015 USGS survey trimmed ten feet from the 1952 photogrammetric figure. Koyukon speakers called the peak Deenaalee for centuries before a gold prospector borrowed a presidential surname in 1896.
Vertical relief above surrounding plateaus ranks among Earth's greatest. The mass is mostly pink quartz monzonite pluton jacked upward as the Pacific plate subducts beneath North America while erosion strips softer sediments. James Wickersham's 1903 climb failed; Frederick Cook's 1906 claim remains disputed. The first verified summit came on 7 June 1913 via Walter Harper, Harry Karstens, and Hudson Stuck's party, with Harper, an Alaska Native, first on top.
Naming wars tracked politics: Mount McKinley honoured William McKinley; federal dual naming and later restorations of Denali reflect Indigenous priority against Outside commemorations.
Measured from base to peak, the mountain rises some 18,000 feet, and it is the northernmost summit above 6,000 metres anywhere. Its bulk reflects the right-lateral Denali Fault and a bend in it, driven by the shallow subduction of the Yakutat microplate. Two summits crown the massif: the higher South Summit and a North Summit at 19,470 feet. Five large glaciers, among them the Peters and the Muldrow, pour from its flanks. The name comes from a Koyukon word for high or tall, and Indigenous names exist in seven Alaskan languages. Washington formally adopted McKinley when Woodrow Wilson signed the 1917 national park act; on 28 August 2015 the Obama administration restored Denali as the federal name, and in December 2024 Donald Trump said he would switch it back. Hudson Stuck, who organised the first confirmed ascent, wrote Denali almost exclusively, and Alaskan businesses named for Denali outnumber McKinley ones six to one.
Source: Denali
