From FAO Schwartz, you'll be at the SE corner of Central Park. There's a loop road that runs inside the park for ~6 miles, find this road (on foot, much better than carriage or pedicabs) and start exploring. There are numerous places to take a side path and turn back around, the whole 6 mile loop is a bit much unless you're running/biking.
We're supposed to get a couple inches of snow in the next ...