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Washington Rock State Park
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Washington Rock
State Park

Somerset County, Green Brook Township

Somerset County Park Commission
355 Milltown Road
Bridgewater, NJ 08807

PO Box 5327
North Branch, NJ 08876

(908) 722-1200

GPS Coordinates
40° 36’ 47.65” N 74° 28' 23.70" W

Size: 52 acres

Fees: No entrance fee.
Link to the Related Fees page

Take Route 22 to Greenbrook Township to Washington Rock Road. The park is located on Washington Rock Road.

Facilities & Activities:
  • Picnic tables
  • Scenic overlook


The strategic location of Washington Rock made it a valuable lookout point during the American Revolution for General George Washington in June of 1777 when the British army under General William Howe was moving toward Westfield. From the vantage point of this natural rock outcropping, General Washington had a thirty-mile panoramic view of the valley and was able to instruct his troops to circle behind Howe’s troops and cut off their retreat.

One of the oldest state parks in New Jersey, Washington Rock was originally purchased in 1913 to commemorate the historical events of 1777. Situated on top of Watchung Mountain in Green Brook Township, the park is best known for its scenic vista and historical significance. The park is a popular site for picnicking and relaxing.

Washington Rock is currently being managed by the Somerset County Park Commission. For more information contact: (908) 722-1200.

Keep Your Park Clean

Through the Carry-In/Carry-Out Program you can help us keep your parks clean and beautiful by carrying out the trash you carry in. Bags are provided throughout the site. Thank you for your cooperation and remember to recycle.

Park Hours

Open daily sunrise to sunset.

Special Use Permit Application

Special Use Permit Application Package

A Special Use Permit is utilized to accommodate a specific activity or event being conducted over a short duration. There are two types of special use permits: Non-Commercial and Commercial and fees are based on NJ residency and Non-residents.  A completed application must be submitted to the park/forest area where the activity or event is being held at least 90 days prior to the event. If the special use or event is extremely large or complex, at least one-year’s prior notice is recommended. 

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Questions regarding our parks and forests can be directed to
Michele Buckley of the State Park Service.


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Copyright © State of New Jersey, 1996-2004
Department of Environmental Protection
P. O. Box 402
Trenton, NJ 08625-0402

Last Updated: June 11, 2015

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