- Mount Hood is an active stratovolcano in the Cascade Range and is a member of the Cascade Volcanic Arc. It was formed by a subduction zone on the Pacific Coast and rests in the Pacific Northwest region of the United States. It is located about 50 miles (80 km) east-east-southeast of Portland, on the border between Clackamas and Hood River counties, and forms part of the Mount Hood National Forest. With a summit elevation of 11,249 feet (3,429 m), it is the highest mountain in the U.S. state of Oregon and is the fourth highest in the Cascade Range.