Originally Posted by 1993Renegade
bull run park.
I second this. For Shotgun (done many times) and Archery (which I've never done, personally) it's a great facility.
I don't know of any outdoor pistol/rifle ranges, but I'm sure they exist. If you can stand to shoot targets indoor (pistol) then the Blue Ridge Arsenal in Chantilly isn't bad - they also offer pistol shooting classes to help improve your accuracy and general bad-ass-ness.