The Abajo Mountains, sometimes referred to as the Blue Mountains, are a small mountain range west of Monticello, Utah, south of Canyonlands National Park and north of Blanding, Utah. The mountain range is located within the Manti–La Sal National Forest. The highest point within the range is Abajo Peak at .
The range was reputedly named by the Spanish in the 1700s, the name "Abajo" meaning "low".
thumb|none|upright=1.5|Mountain ranges associated with laccoliths and other igneous intrusions on the Colorado Plateau, southwestern United States. The red dot marks the Four Corners, the intersection of Utah, Colorado, New Mexico, and Arizona. L, [[La Sal Range; A, Abajo Mountains; S, (Sleeping) Ute Mountain; C, Carrizo Mountains; N, Navajo Mountain; H, Henry Mountains.]]