Dinosaur Diamond
The Colorado portion of this byway heads southeast from the state line on U.S. Highway 40 to Dinosaur, where it turns south to cross Coal Oil Basin to Rangely. From Rangely, it follows Colorado 139 through Caņon Pintado, over Douglas Pass, and down to Loma on I-70. From there, the byway goes east on a spur that ends in Grand Junction or west and into Utah.
