 The three mountains that are often considered taller than Mount Everest when measuring from base to summit. Mauna Kea, located in Hawaii. It is estimated to be about 33,500 feet tall. Denali, located in Alaska. It stands at approximately 20,310 feet. Chimborazo, situated in Ecuador. Chimborazo's location near the equator allows it to reach a height of 20,564 feet. Making it the closest point to the sun on Earth.