Photo #5785 - Mill Canyon Road Info kiosk. Access to Mill Canyon, Utah Dinosaur Trail (1.8 miles; a 0.25 mile long self-guided trail that contains 150 million years old skeletal remains of numerous kinds of dinosaurs), Halfway Stage Station (1.4 miles; served the traveling public between Moab, Utah and the railroad at Thompson, Utah 35 miles to the north). Mill Canyon Road also gives access to several off-road vehicle trails and hiking areas (e.g Merrimac & Monitor, Utah - Tusher Canyon, Utah - Courthouse Rock)Utah. Utah Highway US 191 is southeastern Utahs main artery, interlinking beautifully sculpted canyons, breathtaking red rock formations, majestic snow-capped mountain peaks, rugged and colorful high desert beauty, geological treasures, mysterious prehistoric ruins and rock art, historic sites, a myriad of recreational opportunities and old-fashioned western hospitality.