There are some rocks and roots toward the end of the trail.
The Piney Loop Trail is a short trail that partially runs through a small stand of pine trees. At just over 0.5 miles, it is a very short trail that shares a trailhead with the Devil's Racetrack Trail. As the name would suggest it loops from its shared origin with Devil's Racetrack to ultimately end back out on Devil's Racetrack.
The trail doesn't feature much climbing and the only difficult part of it are the occasional roots or rocks. It should be noted, that as you get toward the end of the trail, the number of rocks increases.