- Southern Terminus:
- River Road (CR 521) at the New York-New Jersey state line
- Northern Terminus:
- Port Jervis city line
- 0.32 miles
Maple Avenue is a short extension of River Road (CR 521) into New York. It begins at the state line and passes under I-84 with no interchange. After a short distance, it enters the City of Port Jervis. The county route designation ends at the city line. Maple Avenue continues through Port Jervis under city jurisdiction. There is a traffic light at East Main Street (US 6). It continues north through the City of Port Jervis. At the city line, Maple Avenue becomes Neversink Drive (CR 80).