Dinosaur National Monument

Dinosaur National Monument straddles the Utah-Colorado border, with the central Quarry Exhibit Hall located 7 miles east of Vernal in Uintah County, Utah. The monument protects one of the world's richest deposits of Late Jurassic dinosaur fossils, exposed in a tilted sandstone layer known as the Carnegie Quarry. The Quarry Exhibit Hall — a glass-and-steel building constructed directly over the quarry cliff face — contains more than 1,500 dinosaur bones left in situ in the rock, allowing visitors to see actual fossils embedded in sandstone exactly where they were excavated rather than reassembled skeletons elsewhere. Species represented in the quarry wall include Allosaurus, Diplodocus, Stegosaurus, Camarasaurus, and Apatosaurus. A free shuttle from the Quarry Visitor Center to the Exhibit Hall is required year-round due to the narrow canyon road. The Utah side of the monument is primarily the fossil quarry; the Colorado side encompasses the Yampa River Canyon and Green River wilderness corridor, accessible by whitewater rafting and the 22-mile Echo Park Road (high-clearance 4WD required in most conditions). The Island Park Road on the Utah side follows the Green River and passes the Josie Morris homestead cabin and a Desert Voices Nature Trail through pinyon-juniper woodland. Fremont people petroglyphs — left by one of the most prolific canyon rock art cultures in North America — appear at multiple locations near the quarry and along Island Park Road. Ranger-led programs at the Quarry Exhibit Hall operate daily in summer and explain fossil excavation techniques and the history of the Carnegie Museum's expeditions that first uncovered the site in 1909.