The Park Service opened Square Tower on 1 September 2011 to limited visits of 10 people a day, three days a week, for six weeks, after being closed to the public for 75 years. We were in the first group to visit the site. After this limited opportunity, it will once again be closed to the public. It was an exceptional opportunity, and a trip we'll remember forever... After the Square Tower hike, we went on the Petroglyph Trail to see the only petroglyphs in the park - a 3 mile round trip loop. The elevation change was pretty steep, with lots of up and down sections, lots of rocks and tree roots trying to trip you, and some very narrow passages through split boulders until you arrived at the site. An undocumented ruin, not in the trail guide, is an interesting place, with relatively easy access. Perhaps this ruin was inhabited by those who left the petroglyphs? Although not a large ruin, it's interesting to see how it was constructed. All the stones used were shaped and fitted precisely. This feature is near the ruins above, and was used by the residents to sharpen tools, leaving ridges and grooves in the rock as evidence they were there. Finally, after lots of hiking, you come to the petroglyphs. This view is looking back to the trail head, with the petroglyphs evident on the top right. The petroglyph panel is approximately 20 feet wide. The trail guide provides an explanation of the symbols, as provided by four Hopi men in 1942. Click here for more photos of the Petroglyph Trail Loop.