Fahnestock State Park  (Hidden Lake)
Putnam County, NY


Located in Putnam County, 8 miles east of Cold Spring.
3.5 miles from the Taconic via Route 301; left turn onto Dennytown Road (or 2.4 miles from Route 9);
0.7 mile from intersection of Dennytown Road and Route 301;
park by the parking lot at Surprise Lake Road or head down the road and park closer to the lake on the left

The AT parking lot on Dennytown Road is 1.2 miles south of the intersection of Dennytown Road and Route 301, on Dennytown Road. There is a little stone hut on the right (east) side and a wide open field along with a bulletin board.

At 2.6 miles, turn S. Highland Road. The AT crosses S. Highland Road (.35 miles from Dennytown Road) at .35 mile from its intersection with Dennytown Road.

The AT crosses Canopus Hill Road at .35 mile from the point at where it turns right. This is confusing , because there are three directions in which Canopus Hill Road goes at this point, north, south and west. (If coming from Oscawanna Lake Road, it is 1.4 miles from the intersection of this road with a left turn of Canopus Hill Road at the three way intersection.) The AT comes down a steep hill and crosses over a stream at the base of the hill.


alpine plants and other perennial borders

rock ledge

265-2000 have to have appointment

opposite Dennytown Road


In the 1860s, five mines operated on Sunken Mine Mountain. Known as the Canada Mines Group, the largest was the Sunk or Stewart Mine: 1,500 feet long and 300 feet deep. Odelltown, an entire community, flourished on Canopus Creek at the foot of Sunken Mine Mountain. A railroad on site transported the ore to NY 301 where horse and wagon carted it to the foundry at Cold Spring and then by barge to New York City.

In 1691 Adolphe Philipse purchased the land.


It has many miles of trails that will take you far from the crowds. There is a figure-eight walk that loops around its southern hills and ridges. 6,200 acres.

Blue trail leads to deep forest of tremendously tall hemlock. Tailings of an abandoned mine on your right. These mines provided ore to the West Point Foundry at Cold Spring. This was turned into the Parrot guns of the Union Army artillery.


Lovely marsh with lots of birds. You turn right past fields of hay-scented fern and down to a charming little brook.

Manmade pond filled with stumps.

Gorgeous maples shade the head of the marsh.

There are two high ridges in the western portion of Fahnestock Park, one culminating in Candlewood Hill in the south and the other in Mt. Shenandoah (1282 feet), a little north of the Park boundary.

Canopus Creek flows through a beautiful rugged ravine in the southwest.

Much of the remaining portion of the Park is rolling country covered with second-growth hardwood forests and a few old hemlock groves.


Dr. Patrick Louis Cooney

Acer pensylvanicum (striped maple)
Acer rubrum (red maple)
Acer saccharum (sugar maple) 5/2/95
Ailanthus altissima (tree-of-heaven)
Amelanchier arborea (shadbush) 5/2/95
Betula alleghaniensis (yellow birch)
Betula lenta (black birch)
Betula populifolia (gray birch)
Carpinus caroliniana (musclewood)
Carya glabra (pignut hickory)
Carya ovata (shagbark hickory)
Castanea dentata (American chestnut)
Cornus florida (flowering dogwood)
Fagus grandifolia (American beech)
Fraxinus americana (American ash)
Juniperus virginiana (red cedar)
Liriodendron tulipifera (tulip tree)
Nyssa sylvatica (tupelo)
Ostrya virginiana (eastern hop hornbeam)
Picea rubens (red spruce)
Pinus strobus (white pine)
Populus deltoides (cottonwood)
Prunus serotina (black cherry)
Quercus alba (white oak)
Quercus prinus (chestnut oak)
Quercus rubra (red oak)
Quercus velutina (black oak) Ranunculus abortivus (kidney-leaf buttercup) 5/2/95
Salix caprea (goat willow) 5/2/95
Tilia americana (American basswood, linden)
Tsuga canadensis (eastern hemlock)
Ulmus americana (American elm)
Ulmus rubra (slippery elm)

Berberis thunbergii (Japanese barberry)
Cephalanthus occidentalis (buttonbush) 8/13/94
Chimaphila maculatum (spotted wintergreen)
Clethra alnifolia (sweet pepperbush) 8/13/94 8/23/94
Comptonia peregrina (sweet fern)
Cornus amomum (silky dogwood) 7/6/95
Cornus racemosa (gray dogwood)
Corylus sp. (hazelnut)
Gaultheria procumbens (wintergreen) 7/6/95
Gaylussacia baccata (black huckleberry)
Hamamelis virginica (witch hazel)
Ilex verticillata (winterberry)
Kalmia latifolia (mountain laurel) 6/10/94
Lindera benzoin (spicebush) 5/2/95
Lyonia ligustrina (male berry) 7/6/95
Mitchella repens (partridge berry)
Rhododendron viscossum (swamp azalea) 7/6/95
Ribes sp. (gooseberry) 5/2/95
Rosa multiflora (multiflora rose)
Rubus odoratus (purple-flowering raspberry) 7/6/95
Rubus sp. (blackberry) 6/10/94
Salix discolor (pussy willow)
Sambucus canadensis (common elderberry) 7/6/95
Sambucus racemosa (red elderberry)
Spiraea alba var. latifolia (meadowsweet) 7/26/94 8/13/94 8/23/94
Spiraea tomentosa (steeplebush) 7/26/94
Vaccinium corymbosum (highbush blueberry) 5/2/95
Vaccinium pallidum (hillside blueberry)
Vaccinium stamineum (deerberry) 6/10/94
Viburnum acerifolium (maple-leaf viburnum)
Viburnum dentatum (arrowwood viburnum) 6/10/94

Amphicarpaea bracteata (hog peanut) 8/13/94 8/23/94
Apios americana (ground nut) 8/23/94
Celastrus orbiculatus (Asiatic bittersweet)
Cuscuta sp. (dodder)
Parthenocissus quinquefolia (Virginia creeper)
Smilax spp. (greenbrier)
Toxicodendron radicans (poison ivy)
Vitis aestivalis (summer grape)
Vitis labrusca (fox grape)

Achillea millefolium (yarrow) 7/6/95 8/13/94 8/23/94
Actaea alba (doll's eyes)
Agrimonia sp. (agrimony) p. 236 8/13/94
Alisma subcordatum (small water plantain) 9/05/98waning
Alliaria petiolata (garlic mustard) 5/2/95
Ambrosia sp. (ragweed) 8/13/94
Ambrosia trifida (giant ragweed) 9/05/98
Anemone quinquefolia (wood anemone) 5/2/95
Apocynum androsaemifolium (spreading dogbane) 7/6/95
Apocynum cannabinum (Indian hemp dogbane) 7/26/94 8/23/94
Aquilegia canadensis (columbine)
Aralia nudicaulis (wild sarsaparilla)
Arctium lappa (great burdock) 8/23/94
Arisaema triphyllum (jack-in-the-pulpit) 5/2/95
Artemisia vulgaris (common mugwort)
Asclepias incarnata (swamp milkweed) 7/6/95 soon 7/26/94 8/13/94
Asclepias syriaca (common milkweed)
Aster divaricatus (white wood aster) 8/23/94 9/19/94
Aster ericifolia heath aster? 9/19/94
Aster lowrieanus (Lowries aster) 9/19/94
Aster spp. (asters) 9/19/94
Bidens sp. (beggartick) 8/23/94 soon
Boehmeria cylindrica (false nettle) 7/26/94 8/13/94
Brasenia schreberi (water shield)
Callitriche sp. (water starwort)
Campanula rapunculoides (creeping bellflower) 7/6/95 8/13/94 8/23/94
Carum carvi (caraway) 6/10/94
Chelone glabra (white turtlehead) 9/19/94
chickweed 7/6/95
Chrysanthemum leucanthemum (oxeye daisy) 7/6/95
Cicuta bulbifera (bulb-bearing water hemlock) 8/13/94 8/23/94
Circaea lutetiana (enchanter's nightshade) 7/6/95
Claytonia virginica (spring beauty) 5/2/95
Collinsonia canadensis (horsebalm) 8/23/94 9/05/98
Conyza canadensis (horse weed) 8/23/94
Cryptotaenia canadensis (honewort)
Daucus carota (Queen Anne's lace) 7/6/95 7/26/94 8/13/94 8/23/94
Desmodium canadense (showy tick trefoil) 8/23/94
Dianthus armeria (deptford pink) 7/6/95 7/26/94 8/23/94 9/19/94
Drosera rotundifolia (round leaved sundew) 7/26/94
Epilobium coloratum (purple-leaved willow herb) 9/05/98
Erigeron annuus (annual fleabane) 7/6/95
Erythronium americanum (trout lily) 5/2/95
Eupatorium perfoliata (boneset) 8/13/94 8/23/94 9/19/94
Eupatorium purpureum (sweet-scented joe-pye weed) 8/23/94
Eupatorium sp. (joe pye-weed) soon to bloom 7/26/94
Euthamia graminifolia (grass-leaved goldenrod) 8/23/94 9/19/94
Fragaria virginiana (wild strawberry) 5/2/95
Galium asprellum (rough bedstraw) 7/26/94
Galium circaezens (white wild madder) 7/6/95
Galium mollugo (wild madder) 7/6/95
Galium sp. (bedstraw) 7/26/94
Galium triflorum (sweet-scented bedstraw) 7/6/95
Geranium maculatum (wild geranium) 6/10/94
Geum canadense (white avens) 7/6/95
Geum laciniatum (rough avens) 7/6/95
Habenaria viridis var. bracteata (long-bracted orchis)
Hedyotis caerulea (bluets) 5/2/95
Helianthus sp. (sunflower) 8/23/94
Hemerocallis fulva (tawny daylily) 7/6/95
Hieracium caespitosum (field hawkweed) 7/6/95 6/10/94
Hieracium paniculatum (panicled hawkweed) 8/23/94
Hieracium piloselloides (smooth King Devil hawkweed) 6/10/94
Hieracium venosum (rattlesnake hawkweed) 6/10/94
Hydrophyllum sp. ? (water leaf)
Hypericum mutilum (dwarf St. Johnswort) 7/26/94
Hypericum perforatum (common St. Johnswort) 7/6/95
Impatiens capensis (orange jewelweed) 7/26/94 8/13/94 8/23/94
Iris versicolor (larger blue flag iris) 6/10/94
Lactuca canadensis (wild lettuce)
Lechea tenuifolia (narrow leaved pinweed?)
Lemna sp. (duckweed)
Linaria vulgaris (butter and eggs) 7/6/95 8/13/94 8/23/94
Lobelia cardinalis (cardinal flower) 7/26/94 8/13/94 8/23/94
Lobelia inflata (Indian tobacco lobelia) 8/13/94 8/23/94
Lobelia spicata (spiked lobelia) 7/26/94
Lotus corniculatus (birdfoot trefoil) 7/6/95 8/23/94
Ludwigia palustris (water purslane)
Lycopus americanus (water horehound) 7/26/94
Lycopus uniflorus (northern bugleweed) 8/23/94
Lysimachia ciliata (fringed loosestrife) 7/6/95
Lysimachia quadrifolia (whorled loosestrife) 7/6/95
Lysimachia terrestris (swamp candles) 7/6/95
Lythrum salicaria (purple loosestrife) 7/26/94 8/13/94 8/23/94
Maianthemum canadense (Canada mayflower)
Medeola virginiana (Indian cucumber root fruit)
Melampyrum lineare (cowwheat) 7/6/95
Melilotus alba (white sweet clover) 8/13/94
Mentha arvensis (wild mint)
Mimulus ringens (monkey flower) 7/26/94 8/13/94
Monarda fistulosa (wild bergamot)
Monotropa uniflora (Indian pipe)
Myosotis scorpioides (forget-me-not) 7/6/95
Myriophyllum sp.
Najas guadalupensis (najas)
Nuphar variegata (spatterdock) 6/10/94 7/6/95 7/26/94 8/13/94 8/23/94
Nymphaea odorata (fragrant white water lily) 6/10/94 7/6/95 7/26/94 8/13/94 8/23/94
Osmorhiza claytonii (sweet cicely)
Oxalis stricta (yellow wood sorrel) 7/6/95 8/23/94
Panax quinquefolius (dwarf ginseng) 5/2/95
Pedicularis canadensis (wood betony)
Pilea pumila (clearweed)
Plantago lanceolata (English plantain) 6/10/94
Plantago major (common plantain) 7/6/95
Polygonum amphibium (water smartweed)
Polygonum arenastrum (dooryard knotweed) 9/05/98
Polygonum cespitosum (cespitose knotweed) 7/6/95
Polygonum hydropiper (common smartweed) 8/23/94
Polygonum persicaria (lady's thumb) 8/23/94
Polygonum sagittatum (arrow-leaved tearthumb) 8/23/94 9/05/98 9/19/94
Polygonum sp. (knotweed) 8/13/94
Potamogeton sp. (pond weed)
Potentilla simplex (common cinquefoil) 6/10/94
Proserpinaca (water mermaid) 9/05/98
Prunella vulgaris (heal-all) 7/6/95 8/13/94 8/23/94
Pyrola rotundifolia (round-leaved pyrola) 7/6/95
Ranunculus acris (tall buttercup) 6/10/94 7/6/95
Rudbeckia hirta v. pulcherrima (black-eyed Susan) 7/6/95 8/13/94
Rumex acetosella (sheep sorrel) 6/10/94
Rumex crispus (curled dock)
Rumex obtusifolius (broad-leaved dock)
Satureja vulgaris (wild basil) 7/6/95 8/23/94
Scutellaria lateriflora (maddog skullcap) 7/26/94 8/13/94
Scutellaria galericulata (marsh skullcap) 7/26/94 8/23/94 9/05/98
Senecio sp. (ragwort) 6/10/94 8/23/94
Silene vulgaris (bladder campion) 8/23/94 9/05/98
Solanum dulcamara (bittersweet nightshade) 7/6/95
Solidago bicolor (silverrod goldenrod) 9/05/98
Solidago caesia (blue-stemmed goldenrod) 9/05/98 9/19/94
Solidago canadensis var. gigantea (tall goldenrod) 8/23/94
Solidago juncea (early goldenrod)
Solidago rugosa (rough-stemmed goldenrod) 9/19/94
Sparganium androcladum (branching bur-reed) 7/6/95 7/26/94
Symplocarpus foetidus (skunk cabbage)
Taraxacum officinale (dandelion) 7/6/95
Thalictrum dioicum (early meadow rue)
Thalictrum pubescens (tall meadow rue) 7/6/95
Triadenum virginicum (marsh St. Johnswort) 7/26/94 soon 8/13/94
Trifolium arvense (rabbit-foot clover) 7/26/94
Trifolium aureum (hop clover) 7/6/95
Trifolium campestre (low hop clover) 7/6/95
Trifolium pratense (red clover) 6/10/94 8/13/94
Trifolium repens (white clover) 6/10/94
Tussilago farfara (coltsfoot) 5/2/95
Typha angustifolia (narrow-leaved cattail)
Typha latifolia (broad-leaved cattail)
Utricularia sp. (a yellow bladderwort) 7/6/95
Uvularia sessilifolia (sessile-leaved bellwort) 5/2/95
Vallisneria americana (water celery) 9/05/98
Veratrum viride (swamp hellebore) 6/10/94
Verbascum thapsus (common mullein)
Verbena hastata (blue vervain) 7/26/94 8/13/94 8/23/94
Verbena urticifolia (white vervain) 8/13/94 8/23/94
Veronica officinalis (common speedwell) 6/10/94
Vicia cracca (cow vetch) 7/6/95
Viola pubescens (downy violet) 5/2/95
Viola sororia (common blue violet) 5/2/95

Juncus canadensis (Canada rush)
Juncus effusus (soft rush)

Carex crinita
Carex lupulina?
Carex pensylvanica (Pennsylvania sedge) 5/2/95
Carex rosea type sedge
Carex stricta (tussock sedge)
Carex vulpinoidea
Cyperus strigosus or esculentus (umbrella or nut sedge)
Dulichium arundinaceum (three-way sedge)
Eleocharis ovata ? (spike rush)
Eleocharis sp. (spike rush)
Scirpus atrovirens (dark green bulrush)
Scirpus cyperinus (woolly grass bulrush)

Anthoxanthum odoratum (sweet vernal grass)
Microstegium vimineum (Japanese stilt grass)
Phalaris arundinacea (reed canary grass)
Phleum pratense (timothy grass)
Phragmites australis (giant reed grass) 8/23/94
Schizachyrium scoparium (little bluestem grass)
Secale cereale (rye grass)

Ferns and Fern Allies:
Adiantum pedatum (maidenhair fern)
Athyrium filix-femina (lady fern)
Botrychium virginianum (rattlesnake grape fern)