Kenai Fjords National park covers 600,000 acres of southern Alaskan wilderness. The park’s dominating feature is the 700 square mile Harding Icefield, one of the largest ice fields in the United States. Most of the action at this park takes place on the water, where boat tours guide visitors through fjords and past calving glaciers. There are few maintained trails in the park, and most of the backcountry is uncharted wilderness. Off-trail hiking is not recommended.