The La Sal Mountains or La Sal Range is a mountain range located in Grand and San Juan counties in the U.S. state of Utah, along the border with Colorado. The range rises above and southeast of Moab and north of the town of La Sal. This range is part of the Manti-La Sal National Forest and the southern Rocky Mountains. The maximum elevation is at Mount Peale, reaching 12,721 feet (3,877 m) above sea level.

The range contains three clusters of peaks separated by passes. The peaks span a distance of about 10 miles (16 km). The name of the range dates to Spanish times, when the Sierra La Sal (meaning the "Salt Mountains") was a prominent landmark on the Old Spanish Trail between Santa Fe and Los Angeles.

The range formed due to intrusion of igneous rocks and subsequent erosion of the surrounding less-resistant sedimentary rocks. The most abundant igneous rocks are porphyritic, with phenocrysts of hornblende and plagioclase: these rocks are called diorite in some accounts, but trachyte in at least one other source. Syenite, some containing the unusual mineral nosean, makes up a few percent of the igneous rocks present. Some igneous intrusions have the shapes of laccoliths. The ages of these igneous rocks fall between 25 and 28 million years. The magmas were emplaced into sedimentary rocks with ages from Permian to Cretaceous.

The La Sal Mountains rise high over the surrounding Colorado Plateau. Two other ranges on the Plateau, the Abajo Mountains and the Henry Mountains, formed around igneous intrusions of about the same age. Yet other nearby ranges, such as the Carrizo Mountains and Ute Mountain, formed about otherwise similar intrusions emplaced about 70 million years ago. The formation of these igneous rocks in two distinct time intervals has attracted the interest of scientists seeking explanations for magma production below relatively stable parts of the Earth's crust.

• 
  The La Sals at Sunset from Gemini Bridges Road
• 
  View of Horse Mountain in winter, looking to the east on La Sal Loop Road, in Pinhook Valley, Utah
• 
  View of the La Sal mountains from the entrance to Arches National Park
• 
  Little Tuk (left) and Mt. Tukuhnikivatz (right) of the La Sal Range in summer, seen from the south.

The significant peaks of the La Sal Mountains are:

peak name	feet/meter
Mount Peale	12,721 feet (3,877 m)
Mount Mellenthin	12,645 feet (3,854 m)
Mount Tukuhnikivatz	12,482 feet (3,805 m)
Mount Waas	12,331 feet (3,758 m)
Manns Peak	12,272 feet (3,741 m)
Mount Laurel	12,271 feet (3,740 m)
Mount Tomasaki	12,239 feet (3,730 m)
Pilot Mountain	12,200 feet (3,719 m)
Green Mountain	12,163 feet (3,707 m)
Little Tuk	12,048 feet (3,672 m)
Castle Peak	12,044 feet (3,671 m)
La Sal Peak	12,001 feet (3,658 m)

• Geyser Pass

Jules D. Friedman and A. Curtis Huffman Jr., Coordinators, Laccolith Complexes of Southeastern Utah: Time of Emplacement and Tectonic Setting—Workshop Proceedings, United States Geological Survey Bulletin 2158, 292 pages, 1998. http://pubs.usgs.gov/bul/b2158/B2158.pdf

• (1994) "La Sal Mountains" article in the Utah History Encyclopedia. The article was written by Robert McPherson and the Encyclopedia was published by the University of Utah Press. ISBN 9780874804256. Archived from the original on March 21, 2024 and retrieved on June 17, 2024.

• Manti La Sal National Forest