• Views from Penobscot Mountain summit.


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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.

  • 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 »


Algae on rocks near shoreline

Algae on rocks near shoreline


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Pink seastar sits in tidepool.

Seastar in a tidepool


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Glassy lake with rocks and grasses in foreground, fall colors in background

Glassy lake with rocks and grasses in foreground, fall colors in background


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Monitoring buoy in Jordan Pond

Water quality monitoring buoy in Jordan Pond

Photo by C. Wigdahl

What is floating in Jordan Pond?
We’re excited to announce a new project this summer – with a generous gift from Canon, U.S.A., we have launched a data buoy that will continuously monitor water quality at Jordan Pond!

This project, a collaborative effort by Acadia National Park, Friends of Acadia, and the University of Maine, aims to improve our understanding of water quality changes in Jordan Pond. Jordan Pond is known as the clearest lake in Maine, yet the water clarity has been decreasing in recent years for reasons that are currently unknown. In order to identify causes and effects of these changes, and to improve management of key park resources, scientists need more detailed information on what happens within Jordan Pond.

The new data buoy collects measurements every 15 minutes for multiple water quality features (such as pH, dissolved oxygen, algae growth, and others), and is paired with a weather station on the Jordan Pond House, which simultaneously takes meteorological measurements (temperature, wind speed, precipitation, etc.). This allows us to directly compare lakewater features with local environmental changes. Data from the buoy are sent via radio signals to a base station at the Jordan Pond House twice daily, and the information is monitored by aquatic scientists to track what is happening at Jordan Pond.

For more information on the Jordan Pond Buoy, follow us online at the Friends of Acadia Cobblestones blog: http://friendsofacadia.org/news-publications/cobblestones/ Check back often for data posts and information about what we are learning at Jordan Pond!

Did You Know?

A man boards the Island Explorer bus.

Since 1999, propane-powered Island Explorer buses have carried more than two million passengers in Acadia National Park, eliminating more than 685,000 automobile trips and preventing 6,444 tons of greenhouse gases. The fare-free buses are supported by your entrance fees. More...