Little Lava Lake lies in the Cascade Range about 26 miles (42 km) west-southwest of Bend in the U.S. state of Oregon. A close neighbor of Lava Lake, from which it is separated by solidified lava, Little Lava Lake is at an elevation of 4,744 feet (1,446 m) in the Deschutes National Forest. Generally considered the source of the Deschutes River, the lake covers 138 acres (56 ha) to an average depth of 8 feet (2.4 m).