Colorado National Monument is a National Park Service unit near the city of Grand Junction, Colorado. Sheer-walled canyons cut deep into sandstone and granite–gneiss–schist rock formations. This is an area of desert land high on the Colorado Plateau, with pinyon and juniper forests on the plateau. The park hosts a wide range of wildlife, including red-tailed hawks, golden eagles, ravens, jays, desert bighorn sheep, and coyotes. Activities include hiking, horseback riding, road bicycling, and scenic drives; a visitor center on the west side contains a natural history museum and gift shop. There are scenic views from trails, Rim Rock Drive, which winds along the plateau, and the campground. Nearby are the Book Cliffs and the largest flat-topped mountain in the world, the Grand Mesa.

Mesa County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 155,703. The county seat and most populous municipality is Grand Junction. The county was named for the many large mesas in the area, including the Grand Mesa, which is the largest flat-topped mountain in the world.