After passing through Moab, Utah and crossing the Colorado River, you are about five miles from Arches National Park. As you drive along U.S. Route 191, notice the walls of rock on either side of your car windows. The valley you are traveling through is the Moab Fault. The 28 mile geological fracture was caused when the earth’s crust cracked about six million years ago. The mammoth displacement caused the ridgeline on your left (west) to be 2,600 feet taller than on your right (east). The best view of the Moab Fault can be seen at the first turnout inside the park.