Vermont is the 45th-largest state in the country. The Green Mountains cross the country from north to south, which is one of its most notable geographic characteristics. Moreover, the Champlain Valley, another well-known Vermont geographic area, is located near Lake Champlain, while the Connecticut River marks Vermont’s border with New Hampshire.

Since the state is subject to large-scale flooding, many dams and reservoirs have been built over the years. Today we’ll tell you about the largest artificial lake in Vermont, but that’s not all! Keep reading to discover more about the area’s wildlife and the largest natural lake in Vermont!
What’s the Largest Man-Made Lake in Vermont?

In Vermont, the largest man-made lake, or reservoir, is Moore Reservoir.
The largest man-made lake in Vermont is Moore Reservoir. It has a surface area of 3,181 acres, a maximum length of 9.8 miles, and a maximum width of 2 miles. Some sources, however, mention that the reservoir is slightly larger, reaching almost 3,500 acres in surface area. The average depth of the reservoir is 60 feet, but it can reach 120 feet in some parts.
The reservoir is located on the Connecticut River and was formed by the Moore Dam, completed in 1956. However, Moore Reservoir isn’t completely located in Vermont; a part of it is in New Hampshire, where it’s found in Littleton and Dalton communities. In Vermont, it’s located in Waterford and Concord.
The Moore Dam, which forms the reservoir, is one of the most significant hydroelectric dams in the region. In fact, Moore Station is New England’s largest conventional hydroelectric plant. Moreover, the dam plays an important role in controlling floods.
Site preparation for building the dam and the reservoir started in the 1930s when more than 3,000 acres of forest and farmland were cleared. However, the process stopped there and resumed only in 1954, followed by two years of hard work. The dam was completed in 1956, and power generation began in 1957.
In the 1980s, the dam had some leakage problems, which were fixed in 1996. However, the problem reappeared in 2009 and 2010. Authorities discovered that the situation was more significant than they had thought, as the water leaked between the original ground surface and the dam structure. This implied a serious reconstruction.
Recreational Activities at Moore Reservoir
Needless to say, Moore Reservoir is now one of the most popular recreational areas both in Vermont and New Hampshire. It is widely known for providing boating, canoeing, and kayaking facilities. Moreover, since the reservoir is rich in aquatic wildlife, fishing is allowed, too.
Swimming is permitted, too, although the reservoir is often subject to waves and large amounts of floating debris and tree trunks, so you must be very careful if you plan to swim in it. If you don’t, you can spend your afternoon sunbathing and enjoying the silence in the heart of nature!
Moore Reservoir Flora and Fauna

Vermont is home to more than 1,500 native vascular plant species and more than 600 rare native species. Pictured is a blue flag iris.
©David R Duncan/Shutterstock.com
Moore Reservoir is located in eastern Vermont, at the border with New Hampshire. The most notable geographical element in the area is the Connecticut River, which marks the border. In fact, almost half of Vermont’s land area is part of the river’s watershed. The region is home to a myriad of plant and animal species.
Generally, Vermont is home to more than 1,500 native vascular plant species and more than 600 rare native species. Some of the most common aquatic plant species that grow throughout Vermont can be found in and around Moore Reservoir:
- Common Bladderwort
- Water Buttercup
- Common Waterweed
- Cow Lily
- Big-leaf Pondweed
- Arrowhead
- Horsetail
- Blue Flag Iris
Numerous animals call the state home. Near Moore Reservoir, you likely encounter muskrats, which are very common in Vermont. North American river otters are also often found near lakes and rivers and are common in Vermont. Beavers are often spotted in the state, where they are residents of aquatic ecosystems. Another small mammal that lives in forested areas near large water sources is the American mink.
Besides these, the surroundings host animals including:
- Ducks
- Rabbits
- Mice
- Gophers
- Foxes
- Raccoons
- Black bears
- Bobcats
Some birds inhabiting Vermont include:
Can You Fish in Moore Reservoir?

One of the many species of fish anglers can catch at Moore Reservoir is brook trout, the state fish of Vermont.
©M Rose/Shutterstock.com
Yes, you can fish at Moore Reservoir! You’ll undoubtedly enjoy your experience there, as there are numerous locations you can fish from in Vermont and New Hampshire . Besides, if you want to spend more days fishing, you should know that camping is allowed, too.
Here are some fish species you can catch in Moore Reservoir:
- Brown Trout
- Brook Trout
- Rock Bass
- Yellow Perch
- Chain Pickerel
- Northern Pike
- Black Crappie
- Rainbow Trout
- Smallmouth Bass
- Largemouth Bass
What’s the Largest Artificial Lake Entirely in Vermont?

This aerial photo shows the morning glory–style spillway on Harriman Lake/Reservoir in Vermont.
©Great River Hydro, LLC, 2025. Used with permission. – Original / License
As the largest artificial lake entirely within Vermont’s state boundaries, Harriman Reservoir sits at 1,480 feet above sea level, stretches for eight miles, covers a surface area of 2,184 acres, and impounds the Deerfield River in the towns of Wilmington, Whitingham, and Readsboro in the southeastern portion of the state.
The New England Power Company built the dam in 1923 and named it for utility executive Henry I. Harriman. The dam features a shaft, or morning glory–style, spillway that connects to Harriman Station via a 2.5-mile long, 14-foot diameter concrete-lined tunnel. Harriman Reservoir is one of two in the United States to have the morning glory–style spillway. Today, Great River Hydro owns and manages the dam.
As part of its efforts, Great River Hydro provides five day-use recreation areas with picnic grounds, four gravel and concrete boat ramps, and various recreation trails. The shoreline of Lake Whitingham, as it is also known, is undeveloped and protected by conservation easement, making it ideal for a number of recreational activities, including fishing, wildlife viewing, boating, picnicking, and snowshoeing, cross-country skiing, and snowmobiling during the winter months.
What’s the Largest Natural Lake in Vermont?

Lake Champlain has a surface area of 328,960 acres.
©Mark Castiglia/Shutterstock.com
If we’re discussing the largest lakes in Vermont, why not include the largest natural lake as well? We’re talking about Lake Champlain and Lake Bomoseen! Why are we discussing two lakes? Because one of them isn’t located completely within Vermont’s territory.
Lake Champlain is the country’s sixth-largest body of freshwater; part of it is in Vermont. It extends into New York and Quebec. The lake has a surface area of 328,960 acres; compared to its size, Moore Reservoir looks like a small pond! The lake has a maximum length of 107 miles and a maximum width of 14 miles. The shore length is almost 600 miles!
Another large lake in Vermont is Lake Bomoseen. Unlike Lake Champlain, Lake Bomoseen is located completely within Vermont’s territory, in Castleton and Hubbardton towns in Rutland County. It’s the largest natural lake in the state and has a surface area of 2,400 acres and an average depth of 27 feet. Bomoseen State Park, a true natural gem, occupies part of the western shoreline! The lake is a major recreational destination in Vermont, where people can sunbathe, boat, swim, fish, camp, and hunt.
Where is Moore Reservoir Located on a Map?
Moore Reservoir is a man-made lake formed on the Connecticut River, which spans across Littleton and Dalton in New Hampshire, and Waterford and Concord in Vermont. The reservoir covers an area of about 3,490 acres.
Here is Moore Reservoir on a map: