Mountain
Heights of mountains are typically measured above sea level. Using this metric, Mount Everest is the highest mountain on Earth, at . There are at least 100 mountains with heights of over above sea level, all of which are located in central and southern Asia. The highest mountains above sea level are generally not the highest above the surrounding terrain. There is no precise definition of surrounding base, but Denali, Mount Kilimanjaro and Nanga Parbat are possible candidates for the tallest mountain on land by this measure. The bases of mountain islands are below sea level, and given this consideration Mauna Kea ( above sea level) is the world's tallest mountain and volcano, rising about from the Pacific Ocean floor.
Mount Hubbard
Mount Hubbard is the eighth-highest peak in the United States, and the twelfth-highest peak in Canada. It is also notable for its large rise above local terrain. For example, its west face rises above the Alverstone Glacier in less than , and the peak rises above the Hubbard Glacier to the southwest in only . Mount Hubbard is just over from tidewater at Disenchantment Bay. However, despite its precipitous drops to the west, the eastern side provides a non-technical (though long) route to the summit.