What highway otherwise known as CR 85  and meets up with County Road 97 in Bayport? 
County Route 97 (Suffolk County, New York):  It runs from an intersection with CR 85 (Montauk Highway) in Bayport just west of Blue Point on the south shore of Long Island to a junction with New York State Route 25A (NY 25A) in Stony Brook on the island's north shore. Montauk Highway:  The portion of Montauk Highway between Oakdale and Southampton is mostly county-maintained as County Route 80 and County Route 85 (CR 80 and CR 85, respectively).
Montauk Highway