Road 400 (Cottonwood Canyon Road) connects the Page, Arizona area near Glen Canyon Dam via U.S. Route 89 with Cannonville, Utah near the entrance to Bryce Canyon National Park and traverses portions of Grand Staircase-Escalante National Monument. Road 400 is an alternative to US-89 for drivers wishing to avoid US-89's long western detour around the scenic National Monument. Instead, Road 400 offers a unique, little-known shortcut through the monument itself, rarely marked on large-scale planning maps.