Round Valley Reservoir
The New Jersey Water Authority built two significant dams and drowned a sizable valley in 1960, creating the Round Valley Reservoir in Clinton Township, Hunterdon County, New Jersey, USA. The naturally occurring circular valley that is bordered by Cushetunk Mountain bears the reservoir's name. The soft sedimentary rock's erosion resulted in the deep valley.
Cushetunk Mountain's surrounding ridges are resilient because they were underlain by dense, hard volcanic rock diabase that progressively cooled beneath the earth's surface. What was formerly a rural village is now covered by a reservoir; on the lake's bottom are the ruins of a school and a chapel.
Swimming is only permitted in the main area of Round Valley Reservoir because it is technically a reservoir. Even then, swimming is only allowed when there are lifeguards on duty. This enormous body of water is stunning in its stillness and clarity, and it is very alluring on a hot summer day.
If you're fortunate enough to come while the sun is rising or sinking, you'll consider your actions carefully before making ripples that would ruin the reservoir's flawless image. There are several non-swimming activities available in the Round Valley Recreation Area, including volleyball courts, smooth sand perfect for building sandcastles, and fun playgrounds.
Location: Clinton Township, New Jersey
