The next site in Zion National Park we went to visit was in Petroglyph Canyon. The park does allow visitation to this site, but only after talking with a ranger at the Zion Canyon Visitors Center. This is a fun little spot that is only a short walk off the main highway in Zion. The petroglyphs are on the bottom of a large cliff. If you do get directions, take the time to explore the upper canyon. It ends in a rock slide, but there is some great scenery and boulder hopping along the way.
The final site we went to visit is in Spry Canyon. This involves a stressful uphill hike into Zion's backcountry. The petroglyphs here are faded from exposure, but graffiti free!
Zion National Park
Complete Trail Description and Photo Album
Zion National Park History
Zion National Park hiking guide