Owl Pellets and a Slot Canyon
This Canyon is so named because it is home to many Barn Owls. During this hike you can see Owl nests, owl poop, owl pellets, and if you are lucky you may actually see an owl. Either way this is a gem of a slot canyon located in Lake Mead National Recreation Area.
From the parking area at 3 island overlook a trail takes off towards the northwest end of the parking lot. The trail goes down towards the lake shore and follows the lake shore for a short distance. The trail heads northwest initially then turns and heads southwest towards the entrance to White Owl Canyon. Head into the canyon and follow the wash. Before too long you will find yourself in a narrow slot canyon composed of conglomerate rock. Look in the canyon overhangs for signs of wildlife. Look higher on the canyon walls and you may see Barn Owl Poop in the form of "white wash" on the canyon walls. Look under these spots of poop for Owl Pellets. These narrows last for about 1/4 mile. Then the canyon opens up and a culvert runs underneath Lakeshore Road. Continue on through the culvert and keep hiking upstream.
The narrows are more spectacular below Lakeshore road, but above the road you will go through some more narrows and will eventually come to an interesting looking natural bridge. This bridge appears to have formed when a giant part of the canyon wall collapse in just the right spot forming a natural bridge. Past the upper narrows there are two more culverts, these are going underneath the River Mountains Loop trail, a paved 31 mile trail popular with bikers. Past the culverts under the River Mountains loop the wash opens up. Continue upstream as far as you like, but the narrow part of White Owl Canyon is behind you.
When you are ready turn around and follow the wash back the way you came, eventually ending up back at the 3 island overlook trailhead.
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.