Angel Arch Trail is a remote out-and-back through Salt Creek to a huge natural arch. From the Cave Spring / Salt Creek Gate, plan on about 27.5 miles round trip: a sandy road walk to Peekaboo, the long canyon approach, and the signed arch branch, then the same way back. This is a multi-day backpacking trip, not a day hike; allow about 20 hours of walking, usually spread over two or three nights. The current park map's longer route gives 8.5 miles from Peekaboo to the Angel Arch junction. A field report measured 7.5 miles by taking the Trail Arch shortcut, so leave room for route choice and wayfinding.