It extends for 5.60 miles (9.01 km) on a southwest–northeast alignment from an intersection with Seven Lakes Drive to a partial interchange with the Palisades Interstate Parkway.

[3] The portion of the Lake Welch Parkway that lies south of Tiorati Brook Road is closed during the winter.

[6][7] There is a bridge ⅔ mile later over County Route 106[4] (CR 106, Gate Hill Road and Kanawauke Rd, formerly NY 210,[8]).

[4] To access the Palisades Parkway northbound requires a 3-mile detour via Gate Hill Road.

Lake Welch Parkway was conceived in the early 1960s as a new 2.19-mile-long (3.52 km) roadway through Harriman State Park.

Engineers estimated the first section of the Lake Welch Parkway to cost $4.13 million (1962 USD) to build, and contracts would be let in Albany on November 16, 1962.

The slated completion date of the project was December 3, 1969 and would be supervised by the New York State Department of Transportation and its engineer out of Poughkeepsie.