Mount Rainier
In 1890, the United States Board on Geographic Names determined that the volcano would officially be known as Rainier. In 1897, the Pacific Forest Reserve, which included Mount Rainier, was renamed the Mount Rainier Forest Reserve and the national park, that it sits in, also named Mount Rainier was created three years later. A movement to change the mountain's name to Tacoma continues to exist. Congress considered changing the mountain's name in 1924 and after Alaska's Denali was officially changed from Mount McKinley in 2015 the debate was renewed.