Those parts of Monroe, Ontario, Cayuga, Seneca and Wayne Counties lying within a continuous line beginning at the intersection of the New York State Thruway and the Genesee River near Scottsville; thence easterly along the Thruway to Ontario County Road 8; thence northerly along Ontario County Road 8 and Wayne County Road 308 (Canandaigua Road) to Route 31 near Macedon; thence easterly along Route 31 to Route 38 at Port Byron; thence northerly along Route 38 to Route 104A; thence westerly along Route 104A to Voites Creek at the southern end of Little Sodus Bay; thence northerly along the east shore of Voites Creek and Little Sodus Bay to the south shore of Lake Ontario; thence westerly along the south shore of Lake Ontario to Irondequoit Bay; thence southerly along the east shore of Irondequoit Bay to the Penfield-Webster Town line; thence easterly along the Penfield-Webster Town line to Jackson Road; thence southerly along Jackson Road to Jackson Road Extension; thence southerly along Jackson Road Extension to Whalen Road; thence easterly along Whalen Road to Route 250 (Nine Mile Point Road); thence northerly along Nine Mile Point Road to Sweets Corners Road; thence easterly along Sweets Corners Road to Dublin Road; thence southerly along Dublin Road to Route 441 (Penfield Road); thence southeasterly along Route 441 to Fellows Road; thence southerly along Fellows Road to the southern boundary of the Town of Penfield; thence westerly along the southern boundary of the Town of Penfield to the eastern boundary of the Town of Pittsford; thence southerly along the eastern boundary of the Town of Pittsford to Route 96 (Jefferson Road) southeast of the Village of Pittsford; thence northwesterly along Route 96 to Route 252 (still Jefferson Road) in the Village of Pittsford; thence westerly along Route 252 to the Pittsford-Henrietta Town boundary; thence northerly along the Pittsford-Henrietta Town boundary to the Barge Canal; thence westerly along the south bank of the Barge Canal to Winton Road at Brighton; thence southerly along Winton Road to Brighton-Henrietta Town Line Road; thence westerly along Brighton-Henrietta Town Line Road to Route 252 (Jefferson Road); thence westerly along Route 252 to the Genesee River southwest of Rochester; thence southwesterly along the west bank of the Genesee River to the of point of beginning.
(From the NYS DEC Website)