Within the historic district, NY 9P serves a number of stately Victorian homes built in the second half of the 19th and early 20th centuries, as well as buildings owned by Empire State College, some of which were once Skidmore College Buildings. Union Avenue terminates at Circular Street, which abuts the eastern border of Congress Park. From here, NY 9P continues north on Circular Street before turning west on Spring Street a short distance after. The route continues along the north side of Congress Park for three blocks before ending at an intersection with US 9 and NY 50 (Broadway).