NY 11A begins west of the
village of Tully at an intersection with
NY 80 near its exit with
Interstate 81 (I-81) in the
hamlet of Tully Center. Here, the route also connects to Lake Road (unsigned
County Route 134 or CR 134), a local highway leading south to on-ramps for I-81 southbound and a chain of waterbodies known as the Tully Lakes. NY 11A proceeds northward from NY 80 as a two-lane unnamed road, connecting to the end of a ramp from I-81 southbound before curving northwestward into a rural area of the town. The highway runs through alternating stretches of open, lightly developed terrain and undeveloped woodlands, meeting Solvay Road (
CR 238) as it descends into Tully Valley, a wide gully surrounding
Onondaga Creek. The route heads north along the eastern edge of the isolated valley, following the creek into the adjacent town of
LaFayette. Across the town line, NY 11A intersects Otisco Road (
CR 246) and passes several farms on its way to the hamlet of
Cardiff. Here, the route runs past a line of homes prior to passing under
US 20 at the northern edge of the community. Outside of Cardiff, the highway becomes known as Syracuse–Tully Valley Road as it slowly curves to the northwest, matching a similar turn in the course of the creek and its valley. As the road traverses another stretch of cultivated fields, it meets Field Lane, a short connector providing access between NY 11A and US 20. Past this point, NY 11A serves little more than farms before it enters the
Onondaga Reservation. Inside the Onondaga territory, the route initially serves only a handful of scattered homes separated by long stretches of dense forests. After , however, the road bends to the northeast and enters the town of
Onondaga and the hamlet of Indian Village, the main population center of the reservation. NY 11A quickly runs through the linear community, crossing Hemlock Creek on its way to another lightly developed, mostly wooded stretch along the east bank of Onondaga Creek. The route passes only a handful of isolated homes before ending at an intersection with US 11 on the northern edge of the reservation. The junction is located just south of the hamlet of
Nedrow, located along US 11 between the Onondaga territory and the
Syracuse city line. ==History==