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. The Petroglyph Trail Loop hike begins at the Museum and Ranger Headquarters, as seen across the canyon from he trail. First, you descend down into the canyon, then climb back up and along the canyon wall. There's quite a change in altitude over the course of the trail. As we followed the Petroglyph trail, we could see another trail at the bottom of the canyon leading to Spring House, a limited tour we took in 2006 when the Park opened it up for a few lucky souls to visit. It's an 8 mile hike, with a total elevation change of close to 4000 feet. We were pretty tired by the time we got back, but what an experience it was! Beginning the hike in the morning, during the warmer part of the year, is a great way to stay comfortable. The trail is a great experience, with a trail guide book that points out all the interesting features you pass by. Along the way, there are some intresting rock formations. Kids would love to see them, and imagine the way they were formed. This one kind of looks like a monster's face. Some faces peering out at you are absolutely beautiful, however! Click here for more photos of the Petroglyph Trail Loop.