Semi close to DC, Vertical drop, Long Runs
I went up to Blue in Jan 2011 and it quickly became my favorite Mid-Atlantic resort. The runs are long and that thins out the crowd. At points the lift lines were long but the electronic lift tickets and gates made it go pretty quickly. I'm not sure the double black diamond's qualify as such, but they were really fun either way. I only say this because I would usually be pretty careful on double black's but by the end of the day we were taking them full on, barely carving at all.
I'll be going back in a couple weeks for the holiday weekend to take a friend who didn't get to join us last year. Hopefully, they get the rest of the mountain covered by then.