Now concurrent, NY 43 and NY 66 continue northwest through Denault Corners as a two-lane residential street as it crosses into the town of Sand Lake. The routes run northward along the eastern shores of Crooked Lake and past a junction with CR 49 (Eastern Union Turnpike). Soon Crooked Lake gives way to Glass Lake, which is bordered with lakeside homes near NY 43 and NY 66. Just before crossing Glass Lake Road, the routes turn northwest again, crossing into the hamlet of Sand Lake, where they reach a junction with CR 42 (Taborton Road). At this junction, NY 43 forks to the west, while NY 66 continues northwest out of Sand Lake as Miller Hill Road.