N3KZ UHF Repeater Network
Jeff DePolo, WN3A, the owner and licensee of the N3KZ repeater network has established a linked network of (mostly) UHF repeaters that have wide area coverage. These repeaters regularly cover parts of more than 6 states although primary coverage is in Pennsylvania. Maryland, New Jersey and New York also have repeaters linked to the system, and coverage includes northern parts of Delaware and Virginia regularly.
At times, propogation allows coverage of the District of Columbia and parts of Connecticut. I (your webmaster) have had QSOs with people on boats transiting the Cape Cod Canal, apparently through the Ocean City, NJ repeater.
For more information, check out the web site linked below.