Boise, Idaho UFO Sighting (July 1947) — FBI Files
A first saucer wave case from Boise, Idaho. The captain of a United Airlines flight reported sighting five unusual objects while flying over Boise, Idaho.
Background
In July 1947, in Boise, Idaho, U.S. government investigators recorded an unidentified-object incident later released to the public on May 8, 2026 as part of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE). The incident is one of the first wave of “flying saucer” reports that swept the United States after the Kenneth Arnold sighting of June 1947 and the Roswell incident of July 1947. The case was filed with the Federal Bureau of Investigation, whose Knoxville, Albuquerque, Los Angeles, and other field offices routed UFO reports to headquarters under the Bureau’s standing protocols for the protection of vital installations.
What the document records
The captain of a United Airlines flight reported sighting five unusual objects while flying over Boise, Idaho. He described them as thin and smooth on the bottom and rough on top, observing them for approximately 45 miles before they disappeared. The captain stated the objects were not aircraft, smoke, or clouds.
The number of witnesses is not specified in the released document.
Verbatim from the file
“sighted five “somethings” which were “thin and smooth on the bettom and rough appearing on top."". “We followed them in a north-westerly direction for about 45 miles.”. “but whatever they were, they were not another aircraft, nor were they smoke or clouds.””
Type of case
The case is a visual sighting reported by ground or air observers.
Status
All records released under the PURSUE program are designated unresolved by the All-domain Anomaly Resolution Office (AARO) by default. The federal government has not concluded that the events were anomalous, has not concluded that they were conventional, and has not ruled out either possibility. Conventional candidates for sightings of this period include experimental aircraft, weather balloons (especially the Project Mogul series in the late 1940s), atmospheric optical phenomena such as sundogs and lenticular clouds, and astronomical objects including Venus, the Moon, and meteors near the horizon.