• Views from Penobscot Mountain summit.

    Acadia

    National Park Maine

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  • Temporary Road Closure

    A section of the Western Mtn Road in Southwest Harbor will be closed until 8/18 while park crews replace a culvert with a new fish-friendly open bottom culvert. For more information and a map visit our Getting Around Page. More »

  • Trail Closure: Gorge Path weekdays, 7 am - 4 pm

    The section of the Gorge Path between the Hemlock Path intersection and the A. Murray Young Trail intersection is closed until rehabilitation work is completed. The closure will be in effect Mondays through Fridays only, from 7 am to 4 pm.

Field Guide to Algae

As you explore the shoreline in the park, you will often see algae in the shallow waters near the shore or washed up on the rocks. This field guide—developed by Sarah Hall and Joseph Stachelek for their senior capstone project at the University of Maine, under the guidance of Professor Susan Brawley—includes some of the common species you might see. The field guide is divided into four groups:

Remember to step carefully near the water's edge: rocks are slippery, and waves can be dangerous.

Did You Know?

Image of the Guide's Guide cover

The Guide's Guide to Acadia National Park, originally created to share important information about the park's facilities and natural and cultural resources with commercial guides, is available to the public on this website. The guide contains everything you would want to know about the park. More...