Vermilion Cliffs National Monument is bounded by House Rock Valley to the west, US 89A to the southwest and southeast, Glen Canyon NRA to the east and the Utah stateline to the north. Most of the Paria Canyon-Vermilion Cliffs Wilderness Area falls within the monument - the Paria River corridor and the Vermilion Cliffs themselves, but the boundaries extend north into Utah, incorporating another few miles of the river and most of Buckskin Gulch.