NY 423 begins at a junction with
NY 9P in the
hamlet of Snake Hill, located on the eastern shores of
Saratoga Lake in the
town of Stillwater. The route proceeds southeastward as a two-lane highway, winding its way past a handful of homes built on the side of a valley surrounding the lake. The residential surroundings begin to taper off at the top of the valley's edge, where NY 423 meets the south end of
County Route 70 (CR 70). From here, the highway turns slightly eastward, passing through a wooded, marshy area surrounding a small creek. Past the marsh, NY 423 leaves the woods for a stretch of mostly open fields and a small number of isolated homes. It intersects several roads of local importance, including the northern terminus of
CR 75, before it connects to
NY 32 at an intersection adjacent to several farms. NY 423 ends here; however, its right-of-way continues east toward
Bemis Heights as part of NY 32. Both directions of NY 32 lead to
Saratoga National Historical Park, located just to the northeast of NY 423's eastern terminus. ==History==