Use sunset as your turnaround alarm.
The arch itself is only about 27 feet across, which surprises people who know it from photographs. What makes it work is position: it sits right on the cliff edge, so the opening frames a drop into the canyons with the La Sal Mountains behind. NPS calls it one of the most photographed arches in southeast Utah, and at sunrise photographers often lay in wait. The loop is short but rough and uneven, with a rocky hill and stone steps, and it can ice up in winter.
THE sunrise shot - arch glowing over a 500 ft drop into Buck Canyon.
Heat note: desert country - in summer start at dawn and carry more water than feels reasonable.
Water bottle, sunscreen, hat, snacks, comfortable shoes.
Make it a weekend: Willow Flat Campground (Camping, 1 mi) · Kayenta Campground (Dead Horse Point) (Camping, 9 mi) · The Needles Campground (Squaw Flat) (Camping, 17 mi) · Ken's Lake Campground (Camping, 25 mi)
More hikes nearby: Upheaval Dome Overlook (Hike, 4 mi) · Grand View Point (Hike, 5 mi) · Dead Horse Rim Loop (Hike, 10 mi) · Chesler Park Loop (Hike, 17 mi)