On Sunday, Austin and I went up into northern Maryland to the Catoctin Mountains State Park for a long day hike. We have been a little afraid to hike here because so far it has paled in comparison to Utah, but we were pleasantly surprised by the trails through the park.
It was a nice 8.5 mile loop that had some really nice overlooks. The best part was that it was about 10 degrees cooler than DC and most of the time the trail was far enough away from roads that you couldn't hear the traffic. I'm sure it would be a beautiful place to visit again in the fall when all the leaves are changing too!
It's about an hour and a half outside of DC and completely worth the drive! - which is easy for me to say since I slept through the whole thing :)