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Dinosaur Diamond Prehistoric Highway is a multi-state byway that is accessible from various points in both Colorado and Utah. This ancient dinosaur mega-highway offers some of the best museums, collections of fossils and bones, learning and activity centers, and open, active excavations that are still making new discoveries today. Various sites display tracks and bones still unearthed in the ground. Some of the largest, most perplexing creatures have been discovered along this byway, and it is certainly a place for all ages to learn, play, and fulfill a childhood dream of exploring dinosaur country. Come visit and enjoy some of the all-time best dinosaur excavation sites in the world!

480 miles / 772.5 km

Key Attractions

  • A substantial group of dinosaur museums, containing some of the best collections of dinosaur remnants, as well as replicas, recreations, and monuments in the world

    • Dinosaur National Monument, located in eastern Utah and western Colorado.
    • Riggs Hill, near Grand Junction, CO – displays part of a buried dinosaur skeleton for visitors to see

    • Museum of Western Colorado, in Grand Junction, CO – with three active paleontology sites, click here for more information

    • Dinosaur Journey Museum, in Fruita, CO – excellent for all ages, children can be hands on in their discovery and learning with wonderful displays, full-scale recreations, and robotic simulations

    • Dinosaur Hill, just south of Fruita, CO – a one-mile trip around the excavation areas where some of the largest dinosaurs to ever be discovered were found theApatosaurus (Brontosaurus) excelusandBrachiosaurus altithorax

    • The Utah Filed House Natural History Museum in Vernal.
  • Proximity to National Parks (Aches National Park, Zion National Park, Canyonlands National Park, etc.), National Monuments (such as Independence Rock in Colorado National Monument) and ancient Indian rock art (including the famous petroglyphs in 9-mile Canyon)

  • Access to wonderful hiking, camping, biking trails, river rafting (along the Green and the Colorado), and skiing (away from the ski-resorts)


  • 111 miles from Salt Lake City, UT; 250 miles from Denver, CO

  • Driving the byway (Colorado section)

    • Start at the Utah-Colorado border on US-40

    • Turn south onto CO-64 at Dinosaur and continue onto Rangley

    • From Rangley, drive south on SR 139 to Loma

    • From Loma, drive east to Fruita on US-6 and Grand Junction

    • To loop back to the UT section, drive west on I-70 to the UT/CO border, where the Colorado section of the byway ends

  • Driving the byway (Utah section)

    • UT/CO border via I-70

      • The Utah section starts at the UT/CO border on I-70; head west

      • Take exit 212, the eastern Cisco exit, turn left over the Interstate

      • 1 ½ miles west of Cisco, turn left at a three-way junction with UT-128 and head south toward the Colorado River, Castle Valley, and Moab

      • At the intersection with US-191, turn left (south) to reach Moab, UT

    • Moab, UT to Green River, UT

      • Turn right (north) onto US-191 and cross the Colorado River

      • Continue north to Crescent Junction and I-70

      • Take I-70 west past Green River, UT

    • Green River, UT to Price, UT

      • Two miles west of Green River, UT turn north at exit 156 onto US-6/191

      • Drive north towards Price, UT, approximately 60 miles northwest

    • Price, UT to Duchesne, UT

      • From Price, continue north and west on US-6/191 through the town of Helper

      • Four miles north of Helper is where US-6/191 splits; take the right hand turn onto US-191 that runs down over the Price River, the railroad tracks, and around the coal-fired power plant you can see

      • Continue on US-191 for 44 miles up Willow Creek Canyon, up and over Reservation Ridge with a pass at just over 9,000 feet above sea level, and down through Indian Canyon to the town of Duchesne, UT in the Uintah Basin

    • Duchesne, UT to Vernal, UT

      • A few blocks after crossing the Strawberry River, there is a stop sign dividing US-191 from US-40

      • Turn right and drive east on US-40 through Myton at the Duchesne River bridge and then through Roosevelt

      • US-40 continues on into Vernal ending on Main Street

    • Vernal, UT to UT/CO border

      • Take US-40 east for 12 miles to reach Jensen, UT

      • Continue east across the bridge over the Green River

      • Travel 18 miles to UT/CO border where the Utah section of the byway ends

Other Information

  • View Map
  • Web site
  •  Plenty of lodging, food, gas, and camping in various cities