Highlands Military Reservation (Middletown Township, near Highlands, New Jersey)

Middletown Township, near Highlands · New Jersey · World War II, Cold War

Quick BriefBetween 1942 and 1944, the Navesink Military Reservation was constructed to include Battery Isaac N. Lewis, a casemated coastal defense battery of two 16"/50 caliber Mark 2 guns, along with Battery 219, a coastal defense battery of two 6-inch M1903 guns. The batteries were garrisoned by the United States Army Coast Artillery Corps as part of the Harbor Defenses of New York, with Battery Lewis serving as one of the primary batteries guarding Greater New York in World War II.
Coastal defenseOpen to visitors
Highlands Military Reservation, New Jersey

History & Significance

The 736-acre Hartshorne Woods Park now houses the site of a former US Army Coast Artillery post located on a high promontory near the Navesink Twin Lighthouses, occupying 224 acres. The Navesink Highlands were first fortified in 1917 during World War I when four 12-inch coast defense mortars were placed for seacoast defense as Battery Hartshorne, named for Richard Hartshorne, a settler who acquired the land in the 1670s, and were disarmed in 1920.

During World War II, two 16-inch Navy guns mounted in Battery Lewis in May 1943 weighed over 150 tons each and had barrels over 60 feet in length, capable of firing armor-piercing projectiles 2100 pounds in weight with range from Point Pleasant Beach to the east end of Long Island. The guns were manned faithfully by National Guard troops but never fired in anger during the war, and the original guns were removed in 1948.

In December 1950, the 646th Aircraft Control and Warning Squadron moved to the Navesink Military Reservation with a new General Electric radar, designated P-9 in July 1951 as the ninth permanent radar site in the nation, and the facility was renamed Highlands Air Force Station in December 1953. From 1966 to 1974, the Highlands Army Air Defense Site served as the Army Air Defense Command Post directing Nike fire units in the New York Defense Area. The Navesink Military Reservation was added as a historic district to the National Register of Historic Places on October 13, 2015.

Key Facts

StateNew Jersey
LocationMiddletown Township, near Highlands
Established1942
Decommissioned1974
War / eraWorld War II, Cold War
Current statusState or National Park
Coordinates40.39138889, -73.99388889
NRHP reference15000011

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🧳 Visiting

What you’ll see when you visit:

  • WWII-era coastal artillery battery concrete structures and bunkers
  • Cold War radar station ruins overlooking the Hudson River and New York harbor approaches
  • Hartshorne Woods Park trails through wooded terrain with military history markers
  • Well-preserved gun emplacements and command centers demonstrating mid-20th century coastal defense engineering
Best time to visitSpring (April-May) and fall (October-November) offer mild temperatures and clear views; summer humidity can be heavy along the New Jersey coast.
Getting thereThe reservation is accessible from JFK Airport (approximately 33 km away); drive to Middletown Township and Highlands in Monmouth County, New Jersey.
From the nearest major airportNewark Liberty International Airport (EWR)🚗 38 mi by road⏱️ ≈ 59 min drive

Sources

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