New York State Route 403
| Cat Rock Road | ||||
Map of Putnam County in southeastern New York with NY 403 highlighted in red | ||||
| Route information | ||||
| Maintained by NYSDOT | ||||
| Length | 2.27 mi (3.65 km) | |||
| Existed | mid-1930s–present | |||
| Major junctions | ||||
| South end | US 9 / US 6 Alt. / US 202 Alt. in Philipstown | |||
| North end | NY 9D / US 6 Alt. / US 202 Alt. in Philipstown | |||
| Location | ||||
| Country | United States | |||
| State | New York | |||
| Counties | Putnam | |||
| Highway system | ||||
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New York State Route 403 (NY 403) is a 2.27-mile-long (3.65 km) state highway located entirely within Putnam County. It connects NY 9D in Philipstown at its northern end to US 9 in the hamlet of Graymoor, where the Appalachian Trail crosses both highways. At that intersection, NY 403 is signed as a route to the Bear Mountain Bridge. Half of its length is uphill going south.