Abajo Mountains, volcanic segment of the Colorado Plateau, in San Juan county, southeastern Utah, U.S. Abajo Peak (11,362 feet [3,463 metres]) is the highest point in the mountains, which comprise eight summits and are embraced by the Manti-LaSal National Forest. The heavily forested range is locally called the Blue Mountains for its appearance. Mining and lumbering are the main economic activities of the region. Sport hunting and hiking draw many visitors to the range.