Dinosaur National Monument's Utah section is reached via SR 149, which joins US 40 at Jensen. One of the world's largest concentrations of fossilized dinosaur bones is found in the park, which encompasses about 325 square miles in Utah and Colorado. Fossilized bones of the Allosaurus and other prehistoric reptiles have been revealed in a single sandstone cliff. Several of the region's exhumed skeletons are exhibited in the Carnegie Museum of Natural History in Pittsburgh. Learn More...