Top 9 Tallest Mountains in the Solar System When asked the tallest mountain in the world, the most common response is likely Mount Everest.ย Measured from the base to the summit, Mount Everest has the highest elevation, above sea level, reaching 29,032-feet. However, Mauna Kea is, in fact, the tallest mountain on Earth, rising more than 33,500 feet from the base to the summit. What is even more surprising […] Brains Emily Crofton | May 3, 2021 2 Comments