If you have the opportunity, definitely try to take in the Stony Man & Little Stony Man hike! Both summits offer great views of the eastern side of the Shenandoah Park, and most of the hike follows the Appalachian Trail. Check out the pics from my trip there last summer!
Don't be fooled by how easily a trail can be traveled when you start heading downhill. The trail to Dark Hollow Falls is all flowers and cotton candy on the way _down_... But coming back is a different story altogether! The climbs can be steep and can really take the wind out of you when climbing _up_hill. So be prepared for the return journey!