The North Mount Marshall summit (3368') is easily-accessible from the Skyline Drive and is the perfect leg-stretcher hike as it is a short 1.0 mile round trip to an outcrop with expansive views.
Park at the Mount Marshall parking area at ~MP 15.6 on the Skyline Drive. From the back of the parking lot, take the white-blazed Appalachian Trail north for a short 0.4 miles to a large rock outcrop with views south.
After finished exploring this outcrop, continue on the AT for another 0.1 miles to reach a second rocky outcrop with views to the northwest. This would be a perfect spot to watch the sunset.
Return to your car by heading back south on the AT to the Mount Marshall parking area.