Quiz: What is the highest peak in the Appalachian Mountains and ho January 14, 2025 by Bennett Ridge What is the highest peak in the Appalachian Mountains and how tall is it? Discover more about Appalachian Tours at our home page. A) Mount Mitchell, 6,684 feet B) Clingmans Dome, 6,643 feet C) Mount Washington, 6,288 feet D) Mount Katahdin, 5,267 feet Submit Answer