What type of miles do you want to do? Do you getting up to ridges (nothing like you have out west since there isn't a treeline here and typically only 2,000 - 4,000 foot "peaks")? Or staying closer to water?
How about doing Big Schloss in George Washington National Forest? http://www.midatlantichikes.com/id25.html
If you want to add miles you could do side trails to Halfmoon Mountain or White Rocks, trail maps both available on hikingupward.com.