County Route 523 (CR 523) is a county highway in the U.S. state of New Jersey. The highway extends from Route 29 in Stockton to U.S. Route 202 (US 202) in Bedminster Township. Route description CR 523 begins at an intersection with Route 29 (Main Street) in Stockton, Hunterdon County, heading northeast on Stockton-Flemington Road through wooded residential areas. The road leaves Stockton for Delaware Township and enters a mix of farms and woods with some homes. The route intersects CR 605 before crossing CR 604 in the residential community of Sergeantsville. CR 523 passes through more rural areas as it comes to a brief concurrency with CR 579. After CR 579 splits to the south, the route enters Raritan Township and enters rural areas with increasing residential subdivisions. CR 523 intersects Route 12 at Dvoor's Circle and crosses into Flemington a short distance later, becoming municipally-maintained Mine Street, which is lined with homes. CR 523 turns north onto Park Avenue, passing more residences along with a few businesses. The route heads northeast on Walter E. Foran Boulevard, crossing back into Raritan Township. At this point, CR 523 resumes county maintenance and becomes a divided highway as it passes residential subdivisions, narrowing back into an undivided road as it turns east and intersects Route 31. After this intersection, the route becomes unnamed as it passes commercial areas before passing farms and making a turn to the north, becoming county maintained again. The road passes through a mix of homes and businesses parks before heading near more farmland, running a short distance to the west of Norfolk Southern's Lehigh Line. After intersecting CR 612, CR 523 turns east onto Flemington-Whitehouse Road and passes over the Lehigh Line, at which point it runs between the South Branch Raritan River to the north and an industrial facility to the south. The road crosses the South Branch Raritan River into Readington Township, where it turns northeast and then north into a mix of woods, farms, and residential neighborhoods. The route curves to the north-northeast as it crosses CR 629 and continues to the CR 620 intersection near more residential areas. CR 523 comes to the community of Whitehouse Station, where the route becomes Main Street as it passes homes, crossing NJ Transit's Raritan Valley Line near White House station. A short distance later, CR 523 intersects US 22 and turns northwest to form a