As of August 2017, the trail has been rehabbed, and abandoned by the Park Service. Reaching the rock will require bushwhacking from the AT or Skyline Drive. This is only recommended in winter when there isn't poison ivy around, and the terrain is clearer.
Bettys Rock lies in the rockiest part of Shenandoah National Park, where you will find a plethora of rock cliffs and boulder fields.
It is generally overshadowed by its large neighbors Hawksbill Mountain which is the highest mountain in the park, and Stony Man, which is the 2nd highest in the park.
Just below the summit of Bettys Rock is a rock outcropping that provides an excellent 180 degree viewpoint of the surrounding Shenandoah mountains including Hawksbill Mountain and Stony Man. The hike to the top can be moderate or short depending on where you begin. What is certain, is that the view from the summit will be well worth the trip, and this is one of the nicest side hikes in the entire park.
There are also opportunities for rock scrambling around the rocks below the summit, if one is to be so daring!
Timber Hollow Overlook (3360')
Park here and go down the hill towards the AT. Take the AT South for about 1 mile. It goes up and down, so you gain and lose elevation along the way.
At the end of the first mile, you will find yourself under Skyline Drive near the Crescent Rock Overlook. Take a left towards the overlook, and follow the blue marks up the hill. At the top of the hill Betty's Rock is 0.3 miles away. A trail marker used to be there but has since been removed. The trail that was there headed directly to the rock outcropping. To nab the actual summit, you will need to walk about 30 yards into the woods.
You can take the same way back to the trailhead (2.5 miles total), or just walk to the overlook and take Skyline Drive 1.1 miles back to the Timber Hollow overlook. That way would add about 300 more yards to the overall trip.
Round Trip Hiking Distance: 2.5 miles
Elevation gain: about 600 feet to the summit
Crescent Rock Overlook (3550')
This was the easy way to the summit. Park here, and walk about 0.3 miles to the summit.
Round Trip Hiking Distance: 0.6 miles
Elevation gain: 130 feet