31 Titus Mill Road, Pennington, Mercer County, New Jersey
825 acres


Traveling south on Route 31 you pass by an intersection with Marshalls Corner-Woodsville Road and Rt. 518.  Continue south and turn left onto Titus Mill Road.  The association is located between Rt. 31 and Pennington & Rocky Hill Road.

There is another part of the SBMWA, north of the main area.  From Trenton; proceed north on Route 31 to Pennington, turn onto the county road Route 518 spur, Route 654; turn right onto Moores Mill -Mount Rose. Drive about one quarter of a mile to a road leading to a parking area on the right.  The property goes from south of Moore's Mill-Mt. Rose Road north to Crusher Road and beyond that road. 


Stony Brook drains the land.


Wargo Pond (built in 1970) has a cattail marsh; fields; forests; wetlands, streams. 


A working organic farm and weekend nature programs for all ages; Buttinger Nature Center; exhibits and displays of nature and art and a discovery room for children; nature shop; Katherine W. Gorrie Butterfly House; arboretum.


Dr. Muriel Gardiner Buttinger held a belief that the Stony Brook-Millstone Watershed Association could make a difference to the quality of life in our region.  With vision, she concluded that the environmental integrity of our 285-square mile region of central New Jersey was being severely threatened and that uncontrolled development, road construction, and pollution would all eventually take their toll.

During a period from 1972-985, Dr. Buttinger made a series of substantial contributions to the Association, enabling an important expansion of our role in the community The foundation she set forth allowed the Watershed to establish a permanent headquarters in Pennington -- and a formidable presence in the region.  Her gifts of the beautiful old farm house pictured on the cover of  the watershed pamphlet, along with 535 acres of land and a substantial cash endowment gift are lasting symbols of her undying commitment to the future of the Watershed Association.

The Watershed Association is a private, nonprofit, environmental organization. Since 1951 it has helped shape and improve the quality of the environment in the central area of  New Jersey.  

Buttinger Environmental Education Center

Provides an indoor Discovery Room featuring hands-on exhibits of the region's geology, ecology, animal and plants, as well as exhibits on human impact and their interaction with environment.

The facility also houses a nature library and a large classroom with various art exhibits throughout the year.

Organic Farm:


Grounds open for hikes and walks.  There are fourteen miles of trails suitable for hiking.  Since there are so many trails, it is best to get a trail map at the office or Buttinger Nature Center.  

The 20-mile Lawrence Hopewell Trail is scheduled to go through through the Lawrenceville School, Mercer County Park Northwest, Rosedale Park and the Stoney Brook-Millstone Watershed Association Reserve, and is expected to be completed in the fall of 2004.

Dr. Patrick L. Cooney

Acer japonica (Japanese maple)
Acer saccharinum (silver maple)
Carya spp. (hickory)
Cedrus sp. (blue atlas cedar)
Fagus grandifolia (American beech)
Gingko biloba (gingko)
Ilex opaca (American holly)
Liquidambar styraciflua (sweetgum)
Magnolia sp. (magnolia)
Metasequoia glyptostroboides (dawn redwood)
Platanus occidentalis (American sycamore)
Quercus spp. (oak)

Shrubs and sub-shrubs:
Rhododendron sp. (rhododendron)
Spiraea alba var. latifolia (meadow sweet) 8/01/98

Achillea millefolium (yarrow) 8/01/98
Apocynum cannabinum (Indian hemp) 8/01/98
Asclepias incarnata (swamp milkweed) 8/01/98
Daucus carota (Queen Anne's lace) 8/01/98
Desmodium canadense (showy tick trefoil) 8/01/98
Dianthus armeria (Deptford pink) 8/01/98
Erigeron annuus (daisy fleabane) 8/01/98
Geum sp. (white or rough avens)
Hieracium sp. (hawkweed) 8/01/98
Impatiens capensis (orange jewelweed) 8/01/98
Lobelia inflata (Indian tobacco lobelia) 8/01/98
Oxalis sp. (yellow wood sorrel ) 8/01/98
Plantago sp. (plantain)
Polygonum sp. (knotweed) 8/01/98
Prunella vulgaris (self-heal) 8/01/98
Pycnanthemum sp. (mountain mint) 8/01/98
Rudbeckia hirta var. pulcherrima (black eyed Susan)
Senecio aureus (golden ragwort)
Solidago canadensis (Canada goldenrod) 8/01/98
Solidago juncea (early goldenrod) 8/01/98
Trifolium pratense (red clover) 8/01/98
Trifolium repens (white clover) 8/01/98
Trifolium sp. (hop clover) 8/01/98
Typha latifolia (broad-leaved cattail)
Verbascum thapsus (common mullein) 8/01/98
Verbena hastata (blue vervain) 8/01/98
Vernonia noveboracensis (New York ironweed) 8/01/98