- Bortle Class (if known)
- IDS Certified
Grand Canyon National Park, in northern Arizona, encompasses 278 miles (447 km) of the Colorado River and adjacent uplands. Located on the ancestral homeland of 11 Associated Tribes, Grand Canyon is one of the most spectacular examples of erosion anywhere in the world—unmatched in the incomparable vistas it offers visitors on the rim. South Rim and North Rim are open 24 hours.