Natural Bridges Sipapu Loop is a premier hiking destination in Blanding, Utah, covering 2.4 miles with 400ft of elevation gain. Stats: 2.4 miles, 400ft gain, Moderate. Type: Loop. Surface: Slickrock/Sand. Time: 1-2 hours. Fee: $20 Natural Bridges NM fee. Dogs: Yes. Permit: No. Wildlife: mule deer, coyotes, ravens, white-collared swifts, canyon wrens. Best seasons: Spring and fall; summer brings extreme heat but mornings are manageable. Sipapu Bridge, at 220 feet tall and 268 feet wide, is one of the largest natural bridges in the world. The loop trail descends into White Canyon via stone steps and ladders for up-close views of this extraordinary sandstone span. Pack plenty of water — desert and high-altitude trails demand more hydration than you expect. Layers are essential above 10,000 feet. Leave No Trace: stay on designated trails, pack out all waste, and respect wildlife and other visitors.