After our morning hike to the confluence overlook we opted to check out the Peekaboo Trail. This can be hiked to from Lost Canyon on the west end, or from the Horse Canyon/Salt Creek 4x4 road on the east end. This road is gated closed and you must get a permit from the visitor center to gain access to the gate code. The reason why is you'll need a beefy 4x4 vehicle that can handle deep sand, and especially deep water. There are numerous water crossings in the 2.5 miles of driving and one stretch of a couple hundred yards where the water is 30" deep. Keep your foot on the gas and whatever you do, don't stop, and you'll be fine!
The old Horse Canyon road is now closed, so continuing upstream to a variety of archaeological sites now requires foot travel. I'm not sure if the road opens in other seasons, it looked to be pretty permanent.
Once we arrived at the trailhead, we quickly headed up to the arch and adjacent petroglyph site before errantly continuing down into Salt Creek. We realized our error and backtracked to the Peekaboo trail which traversed around to the coolest break we encountered on the whole trip. The NPS has installed a ladder in a narrow crack of rock that you climb 25 feet to reach the next level.
From here, the views open up revealing endless varieties of red and white sandstone geology, intermittently cut by green vegetated canyons. We proceeded in, out, and around a few drainages and peninsulas before deciding to call it a day and head back to the truck.
We did see one other group on this hike, but it's a bit of a haul from the paved trailheads, so I don't think Peekaboo gets much visitation. But it would be a great out n back dayhike for anybody backpacking in Lost Canyon or Squaw Canyon for sure.