The Mahwah River is a

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage ...

of the

Ramapo River The Ramapo River is a tributary of the Pompton River, approximately 30 mi (48 km) long, in southern New York and northern New Jersey in the United States. Course The Ramapo river rises in Round Lake, a small freshwater lake in the Town ...

Rockland County Rockland County is the southernmost county on the west side of the Hudson River in the U.S. state of New York. It is part of the New York metropolitan area. It is about from the Bronx at their closest points. The county's population, as of th ...

New York New York most commonly refers to: * New York City, the most populous city in the United States, located in the state of New York * New York (state), a state in the northeastern United States New York may also refer to: Film and television * '' ...

and

Bergen County Bergen County is the most populous county in the U.S. state of New Jersey.New Jersey New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. The Mahwah River runs on a meandering SSW course for about 11 mi (18 km) from its headwaters just north of the hamlet of Ladentown, New York to its mouth which empties into the Ramapo River in

Mahwah, New Jersey Mahwah is the northernmost and largest municipality by geographic area () in Bergen County, in the U.S. state of New Jersey. As of the 2020 U.S. census, the population of the township was 25,487, a decline of 403 from the 25,890 counted in the ...

, just south of the village of

Suffern, New York Suffern is a village that was incorporated in 1796 in the town of Ramapo in Rockland County, New York. Suffern is located 31 miles northwest of Manhattan. As of the 2010 census, Suffern's population was 10,723.geologic fault In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic ...

on the eastern edge of Harriman State Park and below the face of the Ramapo Mountain

escarpment An escarpment is a steep slope or long cliff that forms as a result of faulting or erosion and separates two relatively level areas having different elevations. The terms ''scarp'' and ''scarp face'' are often used interchangeably with ''escar ...

. Numerous brooks and streams flowing out of the Ramapo Mountains to the west feed the river as it runs south. For most of its length the river's course is roughly paralleled by

U.S. Route 202 U.S. Route 202 (US 202) is a spur route of US 2. It follows a northeasterly and southwesterly direction stretching from Delaware to Maine, also traveling through the states of Pennsylvania, New Jersey, New York, Connecticut, Massa ...

Course

Just south of its source at the foot of Lime Kiln Mountain, the Mahwah passes through the Ladentown Swamp, an extensive wetland area that is one of the last unspoiled

aquifer An aquifer is an underground layer of water-bearing, permeable rock, rock fractures, or unconsolidated materials (gravel, sand, or silt). Groundwater from aquifers can be extracted using a water well. Aquifers vary greatly in their characterist ...

s in Rockland County, New York. As it runs south, the river's course is interrupted by numerous dams forming ponds and small lakes. At a number of points, it runs through woodlands and remains in its original natural condition. Approximately 4.5 mi (7.2 km) south of its source the river passes under Sky Meadow Lane and shortly thereafter enters a stretch where it is surrounded by Harriman State Park on both sides. Just south of this the river passes through Kakiat County Park and just beyond the park it passes under Route 202 from west to east. Farther south the river enters Antrim Lake and immediately thereafter it passes under the

New York State Thruway {{Infobox road , state = NY , type = NYST , alternate_name = Governor Thomas E. Dewey Thruway , maint = NYSTA , map = {{maplink, frame=yes, plain=yes, frame-align=center, frame-width=290, type=line, stroke-width=2, type2=line, from2=New Yor ...

, flows through Suffern, south across the state boundary and into the Ramapo River in the town of Mahwah.

Wildlife species

The Mahwah harbors a population of fish species, including

brook trout The brook trout (''Salvelinus fontinalis'') is a species of freshwater fish in the char genus ''Salvelinus'' of the salmon family Salmonidae. It is native to Eastern North America in the United States and Canada, but has been introduced elsewhere ...

brown trout The brown trout (''Salmo trutta'') is a European species of salmonid fish that has been widely introduced into suitable environments globally. It includes purely freshwater populations, referred to as the riverine ecotype, ''Salmo trutta'' morph ...

largemouth bass The largemouth bass (''Micropterus salmoides'') is a carnivorous freshwater gamefish in the Centrarchidae ( sunfish) family, a species of black bass native to the eastern and central United States, southeastern Canada and northern Mexico, but ...

, pickerel,

catfish Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, ...

bluegill The bluegill (''Lepomis macrochirus''), sometimes referred to as "bream", "brim", "sunny", or "copper nose" as is common in Texas, is a species of North American freshwater fish, native to and commonly found in streams, rivers, lakes, ponds and ...

s, suckers, and chubbs. It also hosts waterfowl species, including

wood duck The wood duck or Carolina duck (''Aix sponsa'') is a species of perching duck found in North America. The drake wood duck is one of the most colorful North American waterfowl. Description The wood duck is a medium-sized perching duck. A typi ...

in its northern reaches,

mallard The mallard () or wild duck (''Anas platyrhynchos'') is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa, and has been introduced to New Zealand, Australia, Peru, Brazil, Uruguay, Arge ...

s and

Canada geese The Canada goose (''Branta canadensis''), or Canadian goose, is a large wild goose with a black head and neck, white cheeks, white under its chin, and a brown body. It is native to the arctic and temperate regions of North America, and it is o ...

throughout its length.

Muskrat The muskrat (''Ondatra zibethicus'') is a medium-sized semiaquatic rodent native to North America and an introduced species in parts of Europe, Asia, and South America. The muskrat is found in wetlands over a wide range of climates and habitat ...

beaver Beavers are large, semiaquatic rodents in the genus ''Castor'' native to the temperate Northern Hemisphere. There are two extant species: the North American beaver (''Castor canadensis'') and the Eurasian beaver (''C. fiber''). Beavers ar ...

s and an occasional

otter Otters are carnivorous mammals in the subfamily Lutrinae. The 13 extant otter species are all semiaquatic, aquatic, or marine, with diets based on fish and invertebrates. Lutrinae is a branch of the Mustelidae family, which also includes wea ...

are seen plying its waters as well. Pileated

woodpecker Woodpeckers are part of the bird family Picidae, which also includes the piculets, wrynecks, and sapsuckers. Members of this family are found worldwide, except for Australia, New Guinea, New Zealand, Madagascar, and the extreme polar regions. ...

wild turkey The wild turkey (''Meleagris gallopavo'') is an Upland game bird, upland ground bird native to North America, one of two extant species of Turkey (bird), turkey and the heaviest member of the order Galliformes. It is the ancestor to the domestic ...

, whitetailed deer,

black bear Black bear or Blackbear may refer to: Animals * American black bear (''Ursus americanus''), a North American bear species * Asian black bear (''Ursus thibetanus''), an Asian bear species Music * Black Bear (band), a Canadian First Nations group ...

and

coyote The coyote (''Canis latrans'') is a species of canis, canine native to North America. It is smaller than its close relative, the wolf, and slightly smaller than the closely related eastern wolf and red wolf. It fills much of the same ecologica ...

s are common in the surrounding woodlands and mountains.

Flooding

In the Squires Gate section of Suffern there have been significant episodes of flooding during heavy rainfall. There is debate among local politicians and citizens over the best way to remediate the problem.

Overdevelopment concerns

Recent down-

zoning Zoning is a method of urban planning in which a municipality or other tier of government divides land into areas called zones, each of which has a set of regulations for new development that differs from other zones. Zones may be defined for a si ...

ordinances pushed by local politicians, which allow for high density

development Development or developing may refer to: Arts *Development hell, when a project is stuck in development *Filmmaking, development phase, including finance and budgeting *Development (music), the process thematic material is reshaped *Photographi ...

in the vicinity of the river, have tripped off a firestorm of protest by local citizens and precipitated the creation of community action groups dedicated to protecting the Mahwah and its

watershed Watershed is a hydrological term, which has been adopted in other fields in a more or less figurative sense. It may refer to: Hydrology * Drainage divide, the line that separates neighbouring drainage basins * Drainage basin, called a "watershe ...

against overdevelopment.Preserve Ramapo. Suffern, NY
"Overdevelopment and Downzoning."
Accessed 2009-10-02.

References

External links