Sandberg Pass, California UFO Sighting (February 28, 1949) — USAF Files
On February 28, 1949, a US Air Force pilot reported being circled by a jet-propelled blimp while flying over Sandberg Pass, California.
Historical Context
The sighting at Sandberg Pass occurred during a period of intense public and military preoccupation with unidentified aerial phenomena. Following the June 1947 Kenneth Arnold sighting and the July 1947 Roswell incident, the United States entered an era defined by the “flying saucer” phenomenon. During this time, the sudden appearance of objects exhibiting high-speed maneuvers and unusual propulsion systems prompted widespread speculation regarding advanced technology or extraterrestrial origins. The geography of the American West, characterized by vast, unpopulated mountain passes and rugged terrain, often provided the backdrop for such reports, as the lack of ground-based landmarks made it difficult for observers to gauge the true nature of aerial anomalies.
In the late 1940s, the scientific and military communities were navigating a landscape of rapid technological advancement. The dawn of the jet age introduced new aerodynamic capabilities, while the early stages of the Cold War necessitated heightened surveillance of the skies. This era saw the emergence of various atmospheric and man-made explanations for unidentified objects, ranging from the deployment of high-altitude Project Mogul balloons designed to detect Soviet nuclear tests to the observation of rare meteorological events like lenticular clouds. The Sandberg Pass incident is categorized as a pilot or aircrew sighting, a type of encounter observed directly from a cockpit during active flight, which historically carries significant weight due to the trained observational skills of the witnesses.
The Incident
On February 28, 1949, an unidentified-object incident occurred in Sandberg Pass, California. The details of this encounter were recorded by U.S. government investigators and were later released to the public on May 8, 2026, as part of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE). The documentation for this event is found within official U.S. Department of Defense files.
According to the records, the pilot of Air Force flight 7346 reported being circled by a jet-propelled blimp while flying over the pass. The pilot estimated the object was traveling at a speed of 500 mph at an altitude of 9,000 feet. After the period of circling, the object disappeared on a heading of 180 degrees. The released documentation provides no specific information regarding the size, shape, or color of the object, nor does it specify the total number of witnesses present during the encounter. The official file contains the verbatim notation that the pilot reported being circled by a jet-propelled blimp, flying at an altitude of nine thousand feet, with an estimated speed of 500 MPH.
Investigation and Classification
The investigation of the Sandberg Pass sighting remains part of the broader historical effort to categorize aerial anomalies. At the time of the report, such incidents were processed through military channels as part of standard flight reporting and air defense monitoring. The specific terminology used in the report, such as “jet-propelled blimp,” reflects the era’s attempts to describe objects that combined recognizable aeronautical features with unprecedented propulsion methods.
The status of this case is currently designated as unresolved by the All-domain Anomaly Resolution Office (AARO). Under the parameters of the PURSUE program, all released records are categorized as unresolved by default. The federal government has not reached a conclusion regarding whether the event was anomalous or conventional, leaving both possibilities open. Within the context of 1949, conventional candidates for such sightings include experimental aircraft, weather balloons, astronomical objects like Venus or the Moon, or atmospheric optical phenomena such as sundogs. The lack of definitive data regarding the object’s physical characteristics prevents a conclusive identification of the phenomenon.