Hopewell Township, Mercer County, NJ
472 acres


North of Route 546 and east of Route 31, about 1.5 miles east of Pennington.  Heading north on Federal City Road, the road crosses Lawrenceville Road.  The road jogs and picks up again on the other side of Lawrenceville Road.  The park is 1.5 miles from the junction of Federal City Road and Lawrenceville Road.

There is picnicking and a jungle gym by the lake.

38-acre lake stocked with trout; boating and canoeing allowed; a family picnic area by the lake with stationary grills, open seven days a week; playground for children.


red shale


There are huge lawn paths that go from Rosedale Lake to another lake east of Rosedale Lake.  We walked east around the northern part of Rosedale Lake and picked up the wide lawn path on the east side. We walked to the other lake and then took a path that kept going south and southwest.  When we finally got back to Rosedale Lake the path ended at a huge marsh.  Then we had to slog our way back paralleling the lake shore along a narrow, overgrown path (getting scratched up a bit by the multiflora rose).  But we did make it back.  I guess we could have turned back and gone farther north and picked up another path going west, but I wanted a path to be there and so we slogged through it.

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 platanoides (Norway maple)
Acer rubrum (red maple)
Cornus florida (flowering dogwood)
Fraxinus americana (white ash)
Juglans nigra (black walnut)
Juniperus virginiana (red cedar)
Liriodendron tulipifera (tulip tree)
Prunus serotina (black cherry)
Pyrus malus (apple tree)
Quercus palustris (pin oak)
Quercus rubra (red oak)
Rhus copallina (winged sumac)
Rhus glabra (smooth sumac)
Salix sp. (willow)
Sassafras albidum (sassafras)
Ulmus americana (American elm)

Cornus amomum (swamp dogwood)
Cornus racemosa (gray-stemmed dogwood)
Elaeagnus umbellata (autumn olive)
Lonicera morrowii (Morrow's honeysuckle)
Rosa multiflora (multiflora rose)
Staphylea trifolia (bladder-nut)
Viburnum dentatum (arrowwood viburnum)

Celastrus orbiculatus (Asiatic bittersweet)
Coronilla varia (crown vetch) 8/01/98
Cuscuta sp. (dodder)
Lonicera japonica (Japanese honeysuckle) 8/01/98
Parthenocissus quinquefolia (Virginia creeper)
Toxicodendron radicans (poison ivy)

Achillea millefolium (yarrow) 8/01/98
Agrimonia parviflora 8/01/98
Alisma subcordatum (water plantain) 8/01/98
Apocynum cannabinum (Indian hemp dogbane)
Artemisia vulgaris (common mugwort)
Asclepias incarnata (swamp milkweed) 8/01/98
Asclepias syriaca (common milkweed)
Boehmeria cylindrica (false nettle)
Cicuta maculata (water hemlock)
Daucus carota (Queen Anne's lace) 8/01/98
Dianthus armeria (Deptford pink) 8/01/98
Erigeron strigosus (lesser daisy fleabane) 8/01/98
Eupatorium perfoliatum (boneset) 8/01/98
Euthamia graminifolia (grass-leaved goldenrod) 8/01/98
Heteranthera sp. (mud plantain) 8/01/98
Impatiens capensis (orange jewelweed) 8/01/98
Lespedeza cuneata (Chinese bush clover)
Lindernia dubia (false pimpernel) 8/01/98
Lobelia inflata (Indian tobacco lobelia) 8/01/98
Ludwigia palustris (marsh purslane)
Lycopus virginiana (Virginia bugleweed) 8/01/98
Lythrum salicaria (purple loosestrife) 8/01/98
Matricaria matricarioides (pineapple weed)
Mimulus ringens (monkey flower) 8/01/98
Monarda fistulosa (wild bergamot) 8/01/98
Nuphar variegata (spatterdock) 8/01/98
Oenothera biennis (common evening primrose)
Plantago lanceolata (English plantain) 8/01/98
Plantago major (common plantain)
Polygonum sagittatum (arrowhead tear thumb)
Prunella vulgaris (self-heal) 8/01/98
Pycnanthemum sp. (mountain mint) 8/01/98
Rudbeckia triloba? (thin-leaved coneflower?)
Rudbeckia hirta var. pulcherrima (black-eyed Susan) 8/01/98
Sagittaria latifolia (broad-leaved arrowhead) 8/01/98
Scutellaria lateriflora (maddog skullcap) 8/01/98
Solidago canadensis var. altissima (tall goldenrod) 8/01/98
Solidago gigantea (late goldenrod) 8/01/98
Sparganium sp. (bur reed)
Symplocarpus foetidus (skunk cabbage)
Thalictrum pubescens (tall meadowrue)
Triadenum virginicum (marsh St. Johnswort)
Trifolium arvense (rabbit-foot clover) 8/01/98
Trifolium pratense (red clover) 8/01/98
Trifolium repens (white clover) 8/01/98
Typha latifolia (broad-leaved cattail)
Verbena hastata (blue vervain) 8/01/98
Verbena urticifolia (white vervain) 8/01/98
Vernonia noveboracensis (New York ironweed) 8/01/98
tall yellow lettuce 8/01/98
wild parsnip

Rushes and Sedges:
Carex lucida
Cyperus sp. (nut or umbrella sedge)
Eleocharis ovata (blunt spikerush)
Eleocharis sp. (spikerush)
Juncus effusus (soft rush)
Juncus tenuis (path rush)
Scirpus cyperinus (woolly grass bulrush)

Anthoxanthum odoratum (sweet vernal grass)
Dactylis glomerata (orchard grass)
Echinochloa crus-galli (barnyard grass)
Elymus hystrix (bottle brush grass)
Leersia oryzoides (rice cut grass)
Microstegium vimineum (Japanese stilt grass)
Phalaris arundinacea (reed canary grass)
Phleum pratense (timothy grass)
Schizachyrium scoparium (little bluestem grass)
Tridens flavus (purpletop grass)
Viburnum lentago (nannyberry viburnum)
Viburnum prunifolium (blackhaw viburnum)
Vitis labrusca (fox grape)
Vitis riparia (riverbank grape)

Riccia sp.