Watchung Reservation

Watchung Reservation
Fall foliage along Watchung Reservation Sierra Trail
Location in New Jersey
LocationUnion County, New Jersey
Nearest citySummit and Mountainside
Coordinates40°41′11″N 74°22′24″W / 40.68639°N 74.37333°W / 40.68639; -74.37333
Area1,945 acres (7.87 km2)
Elevation292 ft (89 m)
Governing bodyUnion County Parks Department

Watchung Reservation is the largest nature reserve in Union County, New Jersey, United States. The reservation consists mainly of the upper valley of Blue Brook, between the ridges of the First and Second Watchung Mountains. A dam near the headwaters of the creek creates Lake Surprise.

The reservation covers an area of 1,945 acres (787 ha). Parts of the reservation lie within the city of Summit, the borough of Mountainside, and the townships of Berkeley Heights, Scotch Plains, and Springfield.

The network of trails criss-crossing the reservation are popular with hikers and horseback riders. Biking on the trails is illegal.