Bear Mountain, Rockland/Orange County: Follow Perkins Memorial Drive to the top of Bear Mountain and then head down again; just as you head down (before reaching two-way traffic), take a right turn and follow the dead-end road to the overlook. More information is available here.
Chestnut Ridge, Westchester County: Located in the southern foothills of the Taconic Mountains, this hawk watch is active from mid-August to late November. More information, including directions, is available here.
Franklin Mountain, Oneonta, New York: The Franklin Mountain Hawk Watch, located on the Delaware-Otsego Audubon Society Sanctuary, is noted for late fall season flights of Red-tailed Hawks and Golden Eagles. In addition to the hawk watch, the sanctuary has marked hiking trails through a variety of habitats.
Mount Peter, Orange County: The Mount Peter Hawk Watch is just off Route 17A between Greenwood Lake and Warwick. Take the NYS Thruway (87) to the Harriman exit. After the tolls, head south on Route 17 to 17A, turn right on 17A and head west for 9.4 miles, and then turn right onto Kain Road; the parking area is on the right. More information is available here.
State Line, New Jersey (State Line Lookout on the Palisades Parkway): Active from September through early November. More information, including directions, is available here.