At this point, the route fully enters Hanover Township and heads northeast past more homes, alternating between a four-lane divided and undivided road.

The route narrows into a two-lane undivided road as it interchanges with I-287 and passes through residential and commercial areas a short distance to the east of Lake Parsippany.

The routes follow Intervale Road briefly before making a left turn to resume onto Parsippany Boulevard.

The route continues north into Montville and turns northeast into less developed mountains, running to the east of the Taylortown Reservoir as it crosses into Kinnelon.

In Kinnelon, CR 511 heads near wooded areas of residences, turning east near Fayson Lakes before winding north.

After crossing the New York, Susquehanna and Western Railway's New Jersey Subdivision line, CR 511 turns east onto Main Street and passes more downtown businesses.

The route runs to the north of a lake and crosses into Wanaque, heading east into commercial areas and reaching ramps to and from the southbound lanes of I-287 prior to a junction with the northern terminus of CR 511 Alternate.

Farther north, the road passes more development as it runs a short distance to the east of the Wanaque Reservoir.

The road winds west through more rural areas with occasional homes and businesses before reaching the CR 696 intersection.

North of Pompton Lakes, what is now CR 511 was legislated in the 1927 New Jersey state highway renumbering to be the northernmost part of Route 3.

The highway extends 9.77 miles (15.72 kilometers) from the Boonton Turnpike (US 202) in Wayne to Union Avenue (CR 511) in Wanaque.