Since a lot of normally available hikes are currently off limits, here's a link to a list of alternative hiking areas. Please note that this list is from 2002 and that closure information isn't up to date. The list can be useful for identifying alternative hiking areas, but one still needs to do one's homework as to whether or not a particular area is open or not.
That said, here's the link: http://tchester.org/sgm/lists/nearby_hikes.html
HJ