Get our free mobile appYes—You Can Legally Hike Colorado National Monument at NightTSM GJ W Adams Hiking Under the Stars at Colorado National MonumentRead More: How Long Does It Take To Drive the Colorado National Monument? The Colorado National Monument is open 24 hours a day. LOOK: Hiking Under the Stars at Colorado National Monument If you thought that the Colorado National Monument was already an unforgettable landscape during the day, wait until you see it at night. Don't Head Out Without These Night Hiking EssentialsGetty Images Getty ImagesRead More: Why Did Colorado Abolish Two National Monuments? MORE: Must See Overlooks at the Colorado National Monument How long is the drive through the Colorado National Monument on Rim Rock Drive?