High Quality Content by WIKIPEDIA articles! The Uinta Mountains are a high chain of mountains in northeastern Utah and extreme northwestern Colorado in the United States. A subrange of the Rocky Mountains, they are unusual for being the highest range in the contiguous United States running east to west, and lie approximately 100 mi (160 km) east of Salt Lake City. The peaks range in height from 11,000-13,500 ft (3,400-4,100 m), with the highest being Kings Peak at 13,528 ft (4,123 m), the highest point in Utah. The Mirror Lake Highway crosses the western half of the Uintas on its way to Wyoming. The rocks in the core of the Uinta Mountains are of Neoproterozoic age (between about 700 million and 800 million years old) and consist primarily of quartzite, shale, and slate. These rocks comprise the Uinta Mountain Group, and reach thicknesses of 4 to 7.3 kilometers (13,000 to 24,000 feet). Most of the high peaks are in outcrops of the Uinta Mountain Group. Many of the peaks are ringed with bands of cliffs, rising to broad or flat tops.