What is the tallest mountain in the US?
List of the highest major summits of the United States
Denali
In the United States, only Denali exceeds 6000 meters (19,685 feet) elevation.  Four major summits exceed 5000 meters (16,404 feet), nine exceed 4500 meters (14,764 feet), 104 exceed 4000 meters (13,123 feet), 220 exceed 3500 meters (11,483 feet), and 302 major summits exceed 3000 meters' (9843 feet) elevation.