A view of the La Sal (Salt) Mountain Range in the Fall, south of Moab, Utah. The La Sal Mountains are located in the Grand and San Juan counties of southern Utah near the border with Colorado. The range is encompassed by the Manti-La Sal National Forest, and is part of the southern Rocky Mountains. Its tallest peak, Mount Peale stands at 12,721 feet. The naming of the range comes from a time when the region was controlled by Spain, and the ranges high peaks were a prominent landmark on the Old Spanish Trail. The mountains are comprised largely of igneous rock that dates to the Cretaceous and Permian periods.