Comb Ridge is a 50-mile monocline — a long, knife-edged wall of tilted sandstone — that runs north from the Utah state line like a geological fence across the plateau. Its west face drops nearly 300 metres to the Comb Wash; the east side slopes gently away. The ridge is seamed with canyons, and those canyons hold an astonishing density of Ancestral Puebloan sites.
The BLM road along the wash at the base of the ridge gives access to several hiking trails leading into slot canyons with cliff dwellings visible from below. Arch Canyon and Mule Canyon are both worth exploring. The ridge also marks the approximate boundary of the Navajo Nation, which stretches south and east from here.