Largest lakes & reservoirs in Massachusetts by shoreline length
The length of the exterior shoreline around a lake is measured at the lake’s normal elevation. The shoreline length can be considerably shorter or longer when lake water levels are lower or higher than normal. A lake with many coves has a much longer shoreline than a lake of similar surface area that is nearly circular in shape.When known, the shoreline miles that we report in our statistics include only the lake’s exterior shoreline, and exclude the shorelines of islands located within a lake’s boundaries. In lakes with many islands, those islands’ combined shorelines may exceed a lake’s exterior shoreline.
You can find many of the world’s longest-shoreline lakes on LakeLubbers. Note: For some lakes, "Longest Shorelines" data is unknown or does not apply, so this table may display fewer lakes than the total 19 articles we have published for Massachusetts lakes.
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Below are lakes within USA > US New England Region > Massachusetts > Compared by longest shoreline length in miles. This list does not represent all lakes in Massachusetts, only the 19 Massachusetts lake articles we have published on the LakeLubbers website.
Lake name  |
Shoreline length in miles |
Lake description |
|---|---|---|
| Quabbin Reservoir (Massachusetts, US New England Region, USA, Western Massachusetts) |
118 mi | One of the country’s largest man-made public water supplies, Quabbin Reservoir dominates the landscape in Western Massachusetts. Supplying much of the… |
| Webster Lake, MA (Central Massachusetts, Massachusetts, US New England Region, USA) |
17 mi | Also known as Lake Chaubunagungamaug Webster Lake spans 1,442-acres in southern Massachusetts near the Connecticut border. This clear, spring-fed lake is one of the largest natural lakes… |
| Lake Cochituate (Greater Boston Region, MA, Massachusetts, US New England Region, USA) |
12 mi | Also known as Cochituate Reservoir Lake Cochituate in the Greater Boston region of Massachusetts is a popular recreational lake just a short distance from the city. The lake, less than… |
| Lake Cochichewick (Massachusetts, Northeastern & Merrimack Valley Region, MA, US New England Region, USA) |
7 mi | Also known as The Great Pond One of the earliest of Massachusetts’ iconic Great Ponds, beautiful Lake Cochichewick anchors the Town of North Andover to both its past and its futur… |
| Great Herring Pond (Massachusetts, Southeastern Massachusetts, US New England Region, USA) |
5 mi | Also known as Lake Manomet Nestled just minutes from Massachusetts’ southeastern coastline, Great Herring Pond is a cozy body of water with a surface area of 376 acres. Most of… |
| Long Pond MA (Massachusetts, Southeastern Massachusetts, US New England Region, USA) |
3 mi | A large dose of nature’s best medicine awaits visitors to Long Pond in Massachusetts’ southeastern region. Located only a few miles west of Plymouth B… |
| Walden Pond (Greater Boston Region, MA, Massachusetts, US New England Region, USA) |
2 mi | Part of the American psyche for over 150 years, Walden Pond belongs to us all. This 61-acre ‘pothole lake’ just outside of Concord, MA was the home of… |
| Crystal Lake Boston (Greater Boston Region, MA, Massachusetts, US New England Region, USA) |
1 mi | Also known as Wiswall Pond, Silver Lake, Baptist Pond Crystal Lake has a long history of being the ‘town lake’ in Newton, Massachusetts. Located in the Greater Boston area, this small natural lake is one… |