The petroglyphs are pretty easy to find and it is such a short hike you can do it in about 45 minutes. 

To get to the trailhead, drive to Centerville, Utah and take 400 N all the way towards the mountain. The road with curve to the right with a small dirt road heading to the left. Take the dirt road and follow it to the top and there will be a large parking area. The trailhead is at the north of the parking area. 

Follow the trail as it heads up the mountain and when you come to a fork head north. This trail should head down into the canyon and over a red bridge. Immediately after the bridge turn right and head up canyon. You will hike along the stream and pass a small but beautiful waterfall. Continue up canyon until you reach a small rocky area that requires easy climbing. The petroglyphs are under the small overhand. There is a sign nearby warning people not to deface the petroglyphs. Return the way you came.