North of Ravenshoe Road, the highway diverts onto the boundary between York and Durham through the community of Baldwin before jogging east at York Regional Road 79 (Old Homestead Road). Just south of Sutton, the route curves east, meeting York Regional Road 9 (High Street), which travels into the town. Despite that the highway is now travelling directly east, directional signs still reference the direction of this highway as north. Passing through Virginia and approximately a kilometre inland from Lake Simcoe, the highway passes through a moderately developed area, with frequent businesses lining the route. It passes south of Duclos Point Provincial Nature Reserve prior to meeting Durham Regional Road 23 (Lake Ridge Road) south of Port Bolster, where it crosses from the Regional Municipality of York to the Regional Municipality of Durham. The highway jogs northeastward several kilometres to align with the former Brock–Thorah township line, crossing alongside a power transmission corridor several times along this segment. The final section travels eastward to Highway 12, south of Beaverton and west of Cannington and Woodville.