Just west of Fort Meade is the Patuxent Research Refuge. While you're there, you might want to hop on one of these all-electric, open-air trams to see the place. Or you could just jog.
Yesterday was a scheduled off day. Today, I managed 5 miles, which was half running, half swimming. The humidity is a little high right now. Maybe the storms in the next couple of days will bring it down.