The fjords are long, steep-sided, glacier-carved valleys that are now filled with ocean waters. A mountain platform, one mile high, rises above this dramatic coastline. The mountains are mantled by the 300-square mile Harding Icefield, 35 miles long and 20 miles wide. Only isolated mountain peaks interrupt its nearly flat, snowclad surface. Exit Glacier spills off the massive Harding icefield and is accessible by road.

The park's wildlife includes mountain goats, moose, bears, wolverines, marmots and other land mammals who have established themselves on a thin life zone between marine waters and the icefield's frozen edges. Bald eagles nest in the tops of spruce and hemlock trees. Thousands of seabirds, including puffins, kittiwakes, and murres seasonally inhabit the steep cliffs and rocky shores.