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Lake Information for Round Valley Reservoir


Round Valley Reservoir in Clinton Township was formed in 1960 when the New Jersey Water Authority constructed two large dams and flooded a volcanic crater in the state's Hunterdon County. The Reservoir is named after the naturally formed circular valley surrounded by Cushetunk Mountain. The deep Valley was caused by erosion of the soft sedimentary rock that had filled in the crater. The surrounding ridges of Cushetunk Mountain endure because they were underlaid with dense and durable volcanic rock diabase that cooled slowly under the surface of the earth.

Reaching depths of 180 feet, this 2,000-acre (8 kmĀ²) reservoir is best known for its pristine clear blue waters. The reservoir contains 55 billion gallons of water for use in central New Jersey, and is distributed during times of drought via the nearby south branch of the Raritan River . The New Jersey Division of Wildlife (a department of the New Jersey Department of Environmental Protection) claims the reservoir is the southernmost body of water that contains naturally reproducing lake trout. The park also has a wilderness area for camping, swimming facilities, a boat ramp and nature hiking and biking trails.

The reservoir has been called the Bermuda Triangle of New Jersey, and over 25 people have drowned there since 1971. 6 of them have never been found.

Facilities and Parks: 

A public boat launch is located north of the day use area of the Round Valley Recreation Area.

Fishing Description: 

There are 19 species of fish inhabiting Round Valley Reservoir, including largemouth and smallmouth bass. Rainbow and brown trout are stocked annually and lake trout are abundant. The Division of Fish and Wildlife manages the reservoir as a trophy lake. Anglers must follow the posted special fishing regulations that apply.

Brown Trout
Largemouth Bass
Rainbow Trout
Catfish Family
Optional Information
Maximum depth: 
Surface area: 
Round Valley Reservoir
Lake type: 
New Jersey

Businesses Located Nearby

Bait & Tackle

    Totowa Bait & Tackle Shop
  • 10 Albion Ave - Paterson, NJ
  • (973) 956-0825

Boat Rental

    Spruce Run Boat Rental
  • 1 Van Syckels Rd - Clinton, NJ
  • (908) 638-8234
    Dow's Boat Rental
  • 145 Nolans Point Rd - Lake Hopatcong, NJ
  • (973) 663-3826

Vacation Rental

  • 1531 E 17th St - Brooklyn, NY
  • (718) 627-9292

Bar and Restaurant

    Mi Casita Mexican Bar Restaurant
  • 58 S Main St - Manville, NJ
  • (908) 252-0272
    Union Hotel Restaurant & Bar
  • 76 Main St - Flemington, NJ
  • (908) 788-7474

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