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.
Denali
Denali has a summit elevation of above sea level, making it the highest peak in North America and the northernmost mountain above 6,000 meters elevation in the world. Measured from base to peak at some , it is among the largest mountains situated entirely above sea level (although some Asian mountains i.e. Rakaposhi, Dhaulagiri and Nanga Parbat are even larger in this regard ). Denali rises from a sloping plain with elevations from , for a base-to-peak height of . By comparison, Mount Everest rises from the Tibetan Plateau at a much higher base elevation. Base elevations for Everest range from on the south side to on the Tibetan Plateau, for a base-to-peak height in the range of . Denali's base-to-peak height is little more than half the of the volcano Mauna Kea, which lies mostly under water.