New York State Route 9D
highway in New York
New York State Route 9D (NY 9D) is a north–south state highway in the Hudson Valley region of New York in the United States. It starts at the eastern end of the Bear Mountain Bridge at an intersection with U.S. Route 6 (US 6) and US 202 in Westchester County, and follows the eastern shore of the Hudson River for 25.21 miles (40.57 km) to a junction with US 9 north of the village of Wappingers Falls in Dutchess County. While US 9 follows a more inland routing between the bridge and Wappingers Falls, the riverside course of NY 9D takes the route through the village of Cold Spring and the city of Beacon.
The route was acquired by the state of New York in pieces over the course of the early 20th century. The part north of Beacon was entirely state-maintained by the end of the 1910s, while delays in rebuilding the remainder of the highway to state highway standards kept New York from fully acquiring the road until the early 1930s. NY 9D was assigned as part of the 1930 renumbering of state highways in New York, extending only from Beacon to Wappingers Falls. It was extended south to the Bear Mountain Bridge by the following year.
Route description
Westchester and Putnam counties
Like its parent road, US 9, NY 9D runs north–south parallel to the Hudson River for its entire length. The route begins near the riverbank at the Bear Mountain Bridge in the Westchester County town of Cortlandt, where it meets US 6 and US 202 at the foot of Anthony's Nose. It heads to the northeast as a two-lane road known as the Bear Mountain–Beacon Highway, passing through dense forests in the undeveloped northwestern part of Camp Smith.
This brief starts where responsible research should: with the source description of “New York State Route 9D” as highway in New York. Everything that follows is an evidence route, not borrowed authority.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Apr 26, 2025. The linked authority identifier is Q2485908. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1930.
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This entry incorporates text from “New York State Route 9D” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.