From the Potomac to Pen-Mar: A Hike across Maryland

Looking down into the valley where Boonsboro, Maryland is, from the George Washington Monument State Park.

It's "common knowledge" for AT hikers that Virginia is flat and Maryland is easy. Having hiked 30 miles or so of the Appalachian Trail in Shenandoah National Park in Northern Virginia, that first bit of conventional wisdom can be put to rest. But what about the second one? It can't be that difficult, if some people cross the state's 40.6 miles in one day, right?