Ok. I don't know where you are in DC but here are a couple of spots that may or may not be close to you.
Southern Maryland ATV Park (MD) -
http://www.atvwannaride.com/
Tomahawk MX park (W. VA) Website address:
http://www.tomahawkmx.com/
Tasker's Gap, Edinburgh (VA)
http://www.nvtr.org
George Washington and Jefferson National Forests (VA)
For map details, regulations and restrictions, visit the Lee Ranger district home page at
http://www.southernregion.fs.fed.us/gwj ... ndex.shtml
and the George Washington and Jefferson National Forest ORV trails page
http://www.southernregion.fs.fed.us/gwj ... ndex.shtml
Dave