Was Denali once called Mt McKinley?

Yes, Denali was formerly known as Mount McKinley. The name "Mount McKinley" was officially adopted in 1917 in honor of President William McKinley. However, the name Denali, which means "the High One" in the native Athabascan language, has been used for centuries by Indigenous peoples. In 2015, the U.S. Department of the Interior officially restored the name Denali, recognizing its cultural significance.