The William Post Natural Area runs along the west side of Claremont Road, both north and south of its intersection with Post-Kunhardt Road. It is across the street from the Peters Tract, a 33-acre open space property owned by the Borough of Bernardsville. Pull-off areas for parking are available along Post-Kunhardt Road, and offer easy access to the site. 

Plan Your Visit

Basic Information

Physical Address: 40.729291, -74.584549 

Operating Hours and Seasons: Open Dawn till Dusk.

Fees: Raritan Headwaters does not charge a fee to visit our properties. But maintaining and improving nature preserves is expensive, so we welcome donations to help defray our stewardship costs. Thank you for helping our preserves!


Learn About William Post 

This 22-acre site was donated to the Upper Raritan Watershed Association by Marion and Thomas Peters in 1967.  They wanted to ensure that the property would be used in perpetuity for conservation, open space preservation, conservation education, vegetation and wildlife management and the protection of the headwaters of the Mine Brook.  

The west branch of Mine Brook flows through the site, and a diverse mix of plant species can be found here.  These vary across the property with changes in topography and soil moisture.  Birch, Oak, Tulip Poplar, Red Cedar, White Ash and Black Cherry trees give way to Red Maples and shrubs such as Highbush Blueberry and Smooth Alder.  Skunk Cabbage and Sensitive Fern are abundant in wetter areas.  


Stewardship projects at this property include invasive plant surveying and eradication and trash removal.  Annual surveys are also performed. 

Get Involved

Ways to get involved!