Strasburg Reservoir features 5 miles of hiking trails near Front Royal, VA.
55 West of Front Royal, Left on Fort Valley Rd, Past Signal Knob parking about 8 miles to right on Boyer. Bear Right on Mine Mountain Lane, then right again on Fire Rd. Follow fire road until you get to a closed gate and park there. We were able to negotiate the fire road in a van, so it is not that bad - you just have to be careful to not bottom out on the crest of the road.
http://www.tripleblaze.com/trail.php?c=3&i=1107