This is the third arch seen as one heads up-canyon from the 4wd trailhead. It is the first after Saddle Arch. This view is from the descent along the rim route in late afternoon.
If you enlarge this and look closely, you will see another arch very close to the main one here; it appears positioned almost like a toilet seat.
Upper Muley Twist Canyon; Capitol Reef National Park, UT-- October 2011