The Henry Mountains are geologically unique for their laccolithic origins. This means they were created by a mass of igneous rock that intruded between layers of sedimentary rocks. This is why you can see sandstone layers surrounding much of the bases of the range. The geology makes the mountain range a fascinating place for geology students but also a spectacular place for hikers and sightseers.

On the west side of the range is what I call the Sea of Slickrock, where a large expanse of white and red sandstone has uplifted. It looks very out of place with the rest of the surrounding environment. Time and water has worn runnels down the uplift, in places creating small pools that grasses have been able to survive and create ecosystems in. I found it a colorful and photogenic place to wander. It can be viewed from the road, but a short hike to visit the slickrock slope up close is worth the time, in my opinion.