Three radomes. Six years. All three destroyed by the same mountain. The first, 140 feet in diameter and 100 feet tall, was still under construction in October 1962 when the Columbus Day Storm - the most powerful non-tropical cyclone ever recorded in the Pacific Northwest - tore it apart. The Air Force built a second in 1963. Lightning and high winds flattened it in January 1964. A third, redesigned to withstand what the mountain could throw at it, went up in 1965 and lasted three years before the winds won again in 1968. Mount Hebo, 3,154 feet above sea level and 10 miles from the Pacific Ocean, was the kind of posting where the weather was a more immediate threat than the enemy it was built to detect.
Mount Hebo Air Force Station existed because of geography and Cold War logic. Soviet bombers flying from Siberia toward the continental United States would cross the Pacific, and someone needed to see them coming. The station's FPS-24 search radar, housed in whatever radome was standing at the time, scanned the skies as part of the Semi-Automatic Ground Environment - SAGE - a computer-networked air defense system that linked radar stations across the continent to command centers where interceptors could be scrambled.
The chain worked like this: Mount Hebo's radar detects an incoming aircraft. Data flows through the FST-2B connection to SAGE computers at Adair Air Force Station in Oregon or McChord Air Force Base in Washington. If the contact is hostile, supersonic F-106 Delta Dart interceptors launch. Digital commands reach the fighters via the GKA-5 data link, guiding them toward the target. The whole system - detection to interception - was designed to compress into minutes what earlier wars had measured in hours. Mount Hebo was one node in this network, but a critical one: its position on the Oregon Coast gave it an unobstructed radar horizon over the Pacific approach.
Living on Mount Hebo meant living in a community that was entirely self-contained and frequently cut off from the world below. The 689th Radar Squadron operated the station, and their responsibilities went far beyond radar. Power came from four 1,000-kilowatt diesel generators on site. Water systems served both the main installation and the 27 family homes in a housing area 2.5 miles downslope. Separate sewer systems handled the main site, housing area, and the Ground-to-Air Transmitter Receiver site on nearby Little Hebo.
The access road climbed over 3,000 feet in 8.5 miles, a paved serpentine of tight curves and steep grades that became treacherous in winter. The station kept an arctic snow weasel with tracks, two snowplows, a snow blower, a front-end loader, and a road grader - a fleet of winter vehicles that spoke to how often the road became impassable. Two four-wheel-drive buses carried personnel's children to schools in Hebo and Cloverdale, daily round trips that descended from snowline to sea level and back. The station had its own dining hall, gym, and motor pool. It was, as one description put it, like a small town - except this town existed solely to watch the sky.
The threat evolved, and Mount Hebo evolved with it. The station's FPS-26A height-finder radar was modified between 1967 and 1970 into an FSS-7 sensor capable of detecting and tracking sea-launched ballistic missiles. The conversion reflected a shifting reality: by the late 1960s, Soviet submarine-launched missiles were a more pressing danger than long-range bombers. A submarine in the northeast Pacific could strike the American West Coast with virtually no warning, and radar stations like Mount Hebo represented one of the few chances to detect an incoming missile in its early flight phase.
Detachment 2 of the 14th Missile Warning Squadron was activated at Mount Hebo to operate this new capability. The station also ran AN/FPS-14 Gap Filler radar sites at Washougal, Washington, and Philomath, Oregon, extending its detection coverage into low-altitude blind spots. But even as the mission expanded, the economics of Cold War defense were shifting. Satellite-based early warning systems were coming online. Ground-based radar was becoming less central. The writing was on the wall - or, more accurately, on the budget sheets in Washington.
Between 1954 and 1972, the Air Force acquired 196 acres from private landowners, the U.S. Forest Service, and the General Services Administration. Between 1972 and 1987, it gave them all back. The station closed in 1980, and the GSA contracted to demolish every building the Air Force had erected. The radome support structures came down. The radar tower came down. The barracks, dining hall, gym, motor pool, family housing - all of it demolished and removed.
What remains is a mountaintop returned to meadow. The Siuslaw National Forest's Hebo Ranger District manages the land now. An access road still climbs the mountain, and hikers who reach the summit find a grassy clearing where radar towers once stood. In August 2014, the Forest Service unveiled an interpretive sign titled "Searching the Skies: Mt. Hebo Air Force Station," positioned to overlook the meadow. Former personnel attended the dedication and shared memories. A memorial plaque honors the organizations and people who served there. Otherwise, the mountain offers no evidence that it once hosted an installation capable of tracking Soviet bombers and submarine-launched missiles - only wind, grass, and a view of the Pacific that made the whole station possible in the first place.
Located at 45.22°N, 123.76°W atop Mount Hebo (3,154 feet) in the Oregon Coast Range, approximately 10 miles from the Pacific Ocean. The summit is now a grassy meadow - no structures remain, but the cleared area is visible from the air as an open patch on an otherwise forested peak. The access road switchbacking up the mountain is visible in clear conditions. The small community of Hebo is 5.2 miles to the west-northwest at the base. Nearest airport is Tillamook (KTMK), approximately 18 nautical miles to the northwest. Portland International (KPDX) is about 65 nautical miles to the east. The mountain is subject to severe weather - orographic lift from Pacific airflow creates frequent rain, wind, fog, and winter snow. Three radomes were destroyed by weather here between 1962 and 1968. Best viewed at 4,000-5,000 feet AGL on clear days. Expect turbulence near the summit due to orographic effects.