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.

Present at this intersection is The Birches, a historic house built by Ralph Adams Cram.

Despite some surveyors present in June 1933,[6] local pressure was followed by demands of the town of Philipstown to rebuild Cat Rock Road.

[8] In January 1934, Putnam County Board of Supervisors passed a resolution demanding that Cat Rock Road be surveyed.

The primary use of Cat Rock Road was for those trying to get to NY 9D and avoid the Bear Mountain Bridge toll.

[9] On January 23, 1934, the Board of Supervisors looked at acquiring right-of-way for the reconstruction of Cat Rock Road.

[11] However, reconstruction was delayed constantly, including Herbert Lehman's veto of construction on NY 9D in May 1934.

[12] Despite that, the local newspapers (The Beacon News and Peekskill Evening Star) endorsed construction of Cat Rock Road.

With the road falling apart, the construction was dependent on federal funds from the Works Progress Administration.

[21] Construction progressed into 1936, with graving and excavation work for the new road, which had a slated completion date of December 31, 1936.