CR C26 begins at Old Northern Boulevard in the heart of the Village of Roslyn. It travels north, soon crossing underneath the William Cullen Bryant Viaduct and NY 25A, thence intersecting Wittes Lane. It than continues north into the Village of Roslyn Harbor. It then meanders its way north, passing Cedarmere, eventually reaching Glenwood Road (CR E25) and turning east. It then continues east to Glen Cove Avenue (CR E19), where it terminates.
