Pets must be leashed at all times. Leashed pets are allowed on trails above the rim and throughout the developed areas.Pets are not permitted below the rim, in park lodging (hotel rooms), or on park buses. The only exception is service animals. Leashed pets are permitted in Mather Campground, Desert View Campground, and Trailer Village. Persons wishing to take a service animal below the rim must check-in first at the Backcountry Information Center.
Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the downeast coast provide habitat for more than 4,000 puffins each summer.