William McKinley
In 1896, a gold prospector gave McKinley's name to Denali, the tallest mountain in North America at . The Alaska Board of Geographic Names changed the name of the mountain back to Denali in 1975, which is what it was called by locals. The Department of the Interior followed suit in August 2015 as a part of a visit to Alaska by President Barack Obama. Similarly, Denali National Park was known as Mount McKinley National Park until December 2, 1980, when it was changed by legislation signed by President Jimmy Carter.
Mount Madison
Mountains in the Presidential Range are named for U.S. presidents, with the tallest (Mt. Washington) named for the first president, the second tallest (Mt. Adams) for the second president, and so on. However, due to a surveying error, Mt. Monroe, named after the fifth President, James Monroe, is actually taller than Mt. Madison.