Mauna Loa is not far behind with a peak at 13,677 feet above sea level. Mauna Kea is the world's tallest mountain when measured base to peak, as its base extends nearly 20,000 feet below sea level.

HONOLULU (HawaiiNewsNow) - New safeguards are in place on Mauna Kea to protect an endangered bird once thought to have disappeared from the mountain ecosystem. The uau Hawaiian petrel seabird was ...