Originally Posted by mosquitocontrol
Yeah closest is taking the trek up to Frederick, MD to go to Flying Dog.
Unfortunately the Flying Dog brewery is closed to the public for renovations until sometime in April.
The other option is Clipper City in Baltimore. I've never been up there to tour, but their Heavy Seas Peg Leg Stout and Loose Cannon IPA are two of my favorite local brews. If you do head up to Baltimore, you HAVE to stop in at Max's Taphouse, it's an awesome beer bar in the Fells Point district.
You might be better off spending your time at RFD, which is a bar with a nice beer selection in DC near Chinatown, or make a visit to the Dogfish Head Alehouse in Falls Church. There's also Capital City Brew Co, which has a location in DC and also in Shirlington. Their beers are good but nothing that's going to blow you away.