Comb Ridge and Comb Wash Comb Ridge is an 80 miles long monocline from Elk Ridge in the north down to Kayenta, Arizona. Formed over 65 million years ago, Comb Wash is a major drainage for the area, with tributaries draining from Cedar Mesa to the west as well as down the face of the monocline. It takes its name from the scalloped appearance of the ridgetop, which resembles the comb of a rooster. Bicentennial Scenic Byway Travel the Bicentennial Highway Scenic Byway U-95 past reminders of the Gold Rush era, through magnificent red rock canyons, to the blue waters of Lake Powell. Hike to Anasazi Indian cliff dwellings and explore the world's largest collection of natural bridges.