Wison Arch was named after Joe Wilson, a local pioneer who had a cabin nearby in Dry Valley. It is a five-minute hike off of Highway 191, south of Moab, Utah. It has a span of 91 feet and a height of 46 feet. This formation is known as Entrada Sandstone. Over time, the superficial cracks, joints, and folds of these layers were saturated with water. Ice formed in the fissures, melted under extreme desert heat, and winds cleaned out the loose particles. A series of free-standing fins remained. Air and water attacked these fins until, in some, the cementing material gave way and chunks of rock tumbled out - like Wilson Arch.