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Lake Hopatcong is the largest freshwater body in the state of New Jersey, approximately four square miles (10.4 sq km) in area. The lake is located in the mountains of northern New Jersey, north of Netcong and along the border between Sussex and Morris counties.

The lake is within the borders of four municipalities, Hopatcong, Jefferson Township, Roxbury Township, and Mount Arlington. In the eighteenth century, the lake existed in two separate parts known as the "Great Pond" on the south and "Little Pond" on the north.^[1]

A natural body of water, the area of the lake has been enlarged by the damming of the Musconetcong River, its natural outlet, on the southern side of the lake.

Contents 1 History 2 Wildlife 3 References 4 Sources 5 External links

Before the arrival of Europeans, the current lake area contained two separate lakes that were the sites of Lenape villages. The waters of the lakes were important to the traditions of the matrilineal clans of Native American who had lived in the area for thousands of years. They farmed, fished, and hunted here. Following their traditions, many Amerindians came to this lake to drink before significant ceremonies.

In 1750, a dam was built on the Musconetcong River where it empties from the lake, raising the water level by approximately six feet (2 m) and joining the two lakes into one.

In 1831, a feeder channel was constructed from the lake to supply water to the Morris Canal. The dam on the outlet of the lake has been maintained for flood control.

Starting in the 1880s, the lake became a popular summer resort. Bertrand Island Amusement Park, which flourished until the 1930s, was a major attraction that was open for the late spring, summer, and early fall seasons. After World War II the park was open only during the summer. The amusement park closed completely in 1983, but the lake continues to be a popular recreational destination for the region.

Lake Hopatcong is the only lake in New Jersey with bars and restaurants that are accessible directly by boat. Popular tourist attractions on the lake include the Hopatcong State Park, The Lake Hopatcong Historical Museum, and The Lake Hopatcong Yacht Club.

On November 22, 2005, the EPA gave the Lake Hopatcong Commission a federal grant of $745,000 to improve the water quality and prevent phosphorus from entering the lake.

With the probable exception of the Delaware River, Lake Hopatcong is home to the greatest variety of fish species of any waterway in New Jersey.

Several species of trout are stocked each year, although they have not typically held over and survived the summers, due to an absence of cold, deep, oxygenated pockets of water in the lake. Largemouth bass, smallmouth bass, sunfish, yellow and white perch, rock bass, crappie, chain pickerel, channel catfish, bullhead, and carp all inhabit the lake. Eels also have been caught. Hybrid striped bass, walleye, and most recently, muskellunge have all been stocked successfully within the last few decades and now are thriving. Catfish also are stocked from time to time. The main forage is the abundant alewife herring, (Clupea vernalis), the basis of the lake's fish food chain.

• "EPA brings $745K to Lake Hopatcong". (December 1, 2005). Roxbury Register, pp. 1-2.

• Lake Hopatcong State Park
• Lake Hopatcong Historical Museum

Coordinates: 40°57′N, 74°38′W