Limber pine forest on the Broken Top Loop Trail. The dominant trees at Craters of the Moon are limber pines and junipers. Junipers, mostly Rocky Mountain juniper (Juniperus scopulorum) grow intermixed with limber pine at elevations below 5,500 feet and become the dominant tree on the lava flows below 5,000 feet. Some Utah juniper (Juniper osteosperma) grows in the lower elevations as well. Substantial groves of limber pine trees (Pinus flexilis) occur in the northern part of the Monument.