Henry Mountains Drive Professional Review and Guide
"Designated by the BLM as Bull Creek Pass National Back Country Byway, this route lets you explore the soaring, granitic Henry Mountains, which rose millions of years ago through layers of sedimentary rock and now are more than 6,000 feet above the desert. With vistas across the Colorado Plateau, the tour includes the Little Egypt Geologic Site, with its sphinx-shaped rocks of Entrada sandstone, and 10,485-foot Bull Creek Pass. Curiously, the Henrys are home to bison descended from 18 animals transplanted from Yellowstone National Park in 1941.
The roads are rocky, and flat tires are likely. Bull Creek Pass is generally snow-free July through October, but it’s best if you avoid October’s general hunting season."