• Views from Penobscot Mountain summit.

    Acadia

    National Park Maine

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  • 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.

  • Construction updates

    Construction is continuing throughout the park. More information can be found on our Temporary Closures page. More »

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?

Cobblestone Bridge, faced with rounded cobblestones, has a stream running underneath.

The historic carriage road system at Acadia National Park features 17 stone-faced bridges spanning streams, waterfalls, cliffs, and roads. The design of each bridge, such as Cobblestone Bridge, is unique.