Featured Lake
Eagle Lake (Hancock County)

Of the 9 Great Ponds located wholly within Acadia National Park (ANP), Eagle Lake is the largest - 466 acres, with a maximum depth of 110 feet. (Long Pond, which borders ANP, is the largest lake on Mount Desert Island, and is approximately twice the size of Eagle Lake in terms of surface area.) One of the most visited carriage roads in ANP circles Eagle Lake.

Secchi data are available from the early 1980s, annual averages ranging from 8.7m to 12.8m (28-42 ft). A summary of water quality parameters is here. Eagle Lake is the water supply for Bar Harbor.

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What's New?
Maine DEP's Lake Scorecard

The Maine Department of Environmental Protection (DEP) has developed a new lake scorecard for every lake in Maine. The scorecard summarizes many types of lake data into one color-coded graphic, based on current conditions or trends in the lake's health. The color is indicative of an overall condition assessment of each category: blue = good, yellow = fair, and red = poor. Grey indicates there is not enough data for an assessment.

To find a lake's scorecard, search for a lake, scroll down the lake's overview page and click on the scorecard image.

To learn more about the scorecard and to have the opportunity to ask the DEP questions, attend this webinar:

Understanding the New Maine DEP Lake Scorecard
December 10, 2025 at 10:00 am
Register by CLICKING HERE

Questions? Email: [email protected]

Click here for previous What's New stories

Lake Stewards of Maine
Calling Mainers who love outdoor recreation!

Lake Stewards of Maine seeks paddlers and fishing enthusiasts to join efforts to protect our clear waters and healthy shorelines. Become connected – while you are out canoeing, kayaking, or fishing, you can help by keeping an eye out for strange algae and plants. Training is free. Learn to pitch in by collecting data twice a month in summer, watch for invasive species before they spread, or report ice cover on your favorite lake. Contact us at [email protected] to learn how you can participate or visit www.lakestewardsofmaine.org.

Our lakes are fragile; they need all of us working together!

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We’re grateful to the Maine Outdoor Heritage Fund for making this outreach program possible. Proceeds from the sale of a dedicated instant lottery ticket, currently Dragonfly Dollars, are used to support outdoor recreation and natural resource conservation through this fund. For more information about MOHF, go to www.maine.gov/ifw/mohf.

Lake Stewards of Maine

Lake Stewards of Maine is always looking for more interested volunteers to help us protect lakes. You can join us by filling out the form on our website. We will contact you and get you signed up! Thanks for helping do your part to protect Maine's incredible lakes.

Join US!

Current Conditions

Click here to view current water quality conditions on a representative sample of Maine lakes during summer, or view which lakes have experienced ice-cover in the fall and ice-out in the spring.

Get Involved

The majority of data on lakesofmaine.org comes from certified volunteer citizen scientists. If you are interested in finding a monitoring opportunity, please visit Lake Stewards of Maine or contact our office at 207-783-7733. Email is [email protected]