County Route 77 (Rensselaer County, New York)

New York State Route 351
Map of Rensselaer County in eastern New York with NY 351 highlighted in red
Route information
Maintained by NYSDOT
Length	8.16 mi (13.13 km)
Existed	April 1, 1980 – present
Major junctions
South end	NY 43 in Sand Lake
North end	NY 2 in Brunswick
Location
Counties	Rensselaer
Highway system
New York Highways Interstate U.S. State Reference Parkways ← NY 350 NY 352 →

New York State Route 351 (NY 351) is a north–south state highway in central Rensselaer County, New York, in the United States. It extends for 8.16 miles (13.13 km) from an intersection with NY 43 in the Sand Lake hamlet of West Sand Lake to a junction with NY 2 in the Brunswick hamlet of Cropseyville. The portion of NY 351 north of the hamlet of Poestenkill was originally designated as New York State Route 153 in the 1930s. This designation was removed in the 1940s, and the West Sand Lake–Cropseyville roadway became County Route 77 (CR 77) sometime afterward. On April 1, 1980, all of CR 77 was transferred to the state of New York, at which time it was redesignated as NY 351 by the New York State Department of Transportation (NYSDOT).

NY 351 begins approximately 0.7 miles (1.1 km) east of the hamlet of West Sand Lake at an intersection with NY 43. It initially heads northeastward through the town of Sand Lake as a two-lane highway named Reichard Lake Road, passing through a residential yet wooded area in the vicinity of Racquet Lake. The woods eventually overtake the homes as the route heads away from the lake and into the town of Poestenkill; however, NY 351 quickly enters another residential area based around the route's junction with NY 66. Just west of the intersection is Algonquin Middle School, part of the Averill Park Central School District. Past NY 66, NY 351 changes names to Round Top Road and heads into an isolated part of Poestenkill, passing through a mixture of forests and sparsely developed open areas as it meanders northward.