After CR 61, NY 203 makes a dart to the southwest into the town of Ghent, running around a hillside before turning northwest into the village of Chatham.

Proceeding west through Chatham, the route becomes a two-lane commercial and residential strip before leaving the village for Ghent once again.

At CR 21B, NY 203 winds northward through Kinderhook as a two-lane rural roadway, bending northwest at a junction with Merwin Road.

NY 203 proceeds west, passing north of Winding Brook Country Club and soon into the village of Valatie.

[3] After crossing Kinderhook Creek in the middle of the village, NY 203 enters downtown Valatie, intersecting with Main Street, which proceeds westward to connect with US 9.

At Church Street, the route bends northeast, leaving downtown Valatie and soon back into the town of Kinderhook.

[3] After CR 28, NY 203 bends northeast, crossing under the freight line and running along the eastern side of Niverville.

After Niverville, NY 203 crosses back into the town of Chatham, passing along the eastern shore of Kinderhook Lake as a two-lane residential street.

The route passes the Nassau-Schodack Cemetery and several residences as it bends northeast, eventually entering the village of Nassau.