Pyramid Mountain Natural Historic Area encompasses Pyramid and Turkey mountains in Kinnelon, Boonton and Montville.  Its features include unusual glacial erratics, dramatic rock outcrops, extensive wetlands and waterfalls.  The two most remarkable erratics in the area are Bear Rock, one of the largest in the state, and Tripod Rock, a 160-ton boulder perched atop three smaller boulders.

The nearly 30 miles of marked trails provide opportunities to experience expansive views from flat-topped ridges, visit glacial erratics, see waterfalls and observe wetlands.  The Visitors Center is a starting point for loop hikes.  There are more than a dozen trails in Pyramid Mountain and [just across Boonton Ave, County 511] in Turkey Mountain, ranging from 0.7 to 7.3 miles.  Several new trails were added to the park in 2008/09, including a 1.2-mile white-blazed trail, plus a black-dot trail and yellow-blazed trail, with a combined length of 2.8 miles.  The longer of these two runs from Powerville Road in Boonton Township to Bear Rock at Pyramid Mountain.