County Route 517 (CR 517) is a county highway in the U.S. state of New Jersey. The highway extends from Lamington Road (CR 523) in Tewksbury Township to the New York state line in Vernon Township where it continues as Orange County Route 26. It passes through mostly rural and exurban communities. Its speed limit varies from as much as to as little as .
Route description
CR 517 begins at an intersection with CR 523 in the community of Oldwick in Tewksbury Township, Hunterdon County, heading north on two-lane undivided Main Street. The road passes homes and businesses before merging onto Joliet Street. At the intersection with King Street/Church Street, the route becomes Old Turnpike Road and leaves Oldwick to head into agricultural areas, curving more to the northwest. CR 517 makes a turn west into woodland before heading north again into a mix of woods, farms, and residential subdivisions. In this area, the route crosses CR 512.
A short distance past the CR 512 intersection in Fairmount, CR 517 crosses into Washington Township, Morris County and becomes Fairmount Road. The route continues through rural areas with residences as it makes a turn to the northwest and reaches the community of Long Valley, where there is an intersection with CR 513 in a business area. At this point, CR 517 becomes Schooleys Mountain Road and is also signed by its former designation of Route 24. The road heads northwest, immediately crossing the South Branch Raritan River as it heads into woodland. The road turns west into areas of woods and homes prior to heading north across forested Schooleys Mountain. After crossing the mountain, CR 517 runs through a mix of farm fields and residential neighborhoods.
Upon crossing the Musconetcong River, CR 517 enters Hackettstown in Warren County and immediately intersects the eastern terminus of Route 57. At this intersection, Route 24 signage along CR 517 ends and the county route continues north along with Route 182 on Mountain Avenue, a four-lane undivided road that passes several businesses. Farther north, the road narrows to two lanes and becomes lined with homes. Upon reaching US 46, Route 182 ends and CR 517 turns northwest to run concurrent with US 46 on two-lane Main Street. The road runs through the commercial downtown of Hackettstown, with CR 517 splitting from US 46 by turning north onto High Street.
The road enters residential areas and crosses New Jersey Transit’s Morristown Line/Montclair-Boonton Line. The road passes to the west of a Mars, Incorporated factory before intersecting CR 654 and leaving Hackettstown for Independence Township. The road becomes Allamuchy Road and enters more wooded areas of homes and businesses, intersecting CR 665 before coming to another junction with CR 654. CR 517 crosses into Allamuchy Township and is briefly a three-lane road with two northbound lanes and one southbound lane. The road becomes two lanes again as it continues through forested areas with some agriculture and development, forming the western border of Allamuchy Mountain State Park. The route has an intersection with CR 653 before passing Allamuchy Pond and reaching an interchange with I-80. After this interchange, CR 667 briefly loops to the west of the road before it continues into more agricultural areas and turns to the northeast.