• Views from Penobscot Mountain summit.


    National Park Maine

There are park alerts in effect.
show Alerts »
  • 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.

  • Bubble Pond Carriage Road closure

    Bubble Pond Carriage Road will be closed to all traffic Monday 9/15- Wednesday 9/17 from the parking lot to Triad-Day Mountain Bridge. More »

EarthCache Program

Four people stand on a trail on a mountain using a global positioning system unit.
Acadia's EarthCache Program offers you an exciting opportunity to explore the park while learning more about its geological story.
NPS/Stuart West

This National Park Service-sponsored recreational activity leads you to some of the park's significant geological resources. Using your GPS unit and a set of clues obtained from this website and hidden along the journey, you can guide yourself to a series of sites in the park.

Please note that geocaching with traditional physical caches is not permitted in the park.



  1. GPS unit
  2. Detailed map of Mount Desert Island or an Acadia National Park Map
  3. Piece of paper and pen
  4. Compass (optional)
  5. Logbook, if you are a letterbox enthusiast

General Information

  1. This program requires the use of park roads. The roads required to access the featured geological sites are generally open (weather permitting) from April 15 through November.
  2. All of the sites are located on trails or hardened surfaces. There is no need to go off trail.
  3. As will all EarthCache sites, there are no physical caches to be found. You will be required to search for hidden clues.
  4. Parking is available at or near each coordinate.
  5. As will all park visitors, you a required to pay the park entrance fee or have a valid park pass. There is no fee to participate in the EarthCache Program.

How it Works

  1. Use your GPS and provided clues to search for and find multiple EarthCaches. The Story of Glaciers will provide coordinates for your first stop.
  2. Keep a record of all coordinates. You will need them to solve the final clue.
  3. After a successful completion you can obtain the hand-carved Acadia National Park EarthCache Program stamp imprint and enter your name in the program logbook.
  4. The estimated time to complete the program is 4-6 hours. The tour will take you over much of the park.
  5. Print this certificate of completion when you have finished the program. Acadia EarthCache Certificate

More Information


If you want to know what those who have completed the course think, check out their comments.

Are you interested in learning more about EarthCache activities nationwide? Then visit the Geologic Society of America's EarthCache website.

Did You Know?

From atop Cadillac Mountain, the sun is just starting to rise over the Porcupine Islands.

Cadillac Mountain in Acadia National Park is the tallest mountain along the eastern coast of the United States. During certain times of the year, it is the first place in the U.S. to see sunrise.