Waking up on a Sunday sans hangover is rare in the lazy travelers universe. And so when Sunday morning came around and my head was free and clear of that familiar post-wine misery, I decided to take life by horns…or the bootstraps?…whatever it is you say when you seize the day. The forecast was calling for a sunny 70-degree day and I was/still am feeling a little sluggish from my reunion weekend with the romantic, so I mandated a day of light athleticism. Low and behold, there’s a beautiful national park only a twenty-minute drive from downtown Rockville (who knew!),…