Sea level
It is not, the highest altitude above Sea Level is achieved by the summit of Mt. Everest.
Oregon's highest point, Mount Hood, is 11,249 feet (3,428.8 meters) above sea level
i think it would be a no because sea level is the lowest level object
Manamanah
California's highest point is Mount Whitney and is 14,505 feet (4,421 meters) above sea level
The highest point is Nevado Huascaran, which is 6,768 metres above sea level.
Mt. McKinley in Alaska, at about 20,320 feet (6,194 m) above sea level, is the highest point in the United States.
The highest elevation above sea level is the summit of Mount Everest in Asia, which stands at 29,031.7 feet (8,848 meters).
5m
The highest point is 445 feet above sea level.
Part of it is at sea level. The highest point is 18.04 ft above sea level.