Project Blue Book Case #496. On July 30, 1949, witnesses in the Mount Hood area of Oregon reported an unusual aerial object over the Cascade Range. Mount Hood, the highest peak in Oregon at 11,249 feet, provided a dramatic backdrop against which the object's movements could be clearly observed and its altitude roughly estimated.
This Pacific Northwest sighting came two years after the 1947 wave that had put Oregon on the map of UFO history. Kenneth Arnold's June 1947 sighting of nine objects near Mount Rainier — just 200 miles to the north — had launched the modern UFO era, and the Cascades continued to be a region of frequent reports. Whether this reflected a genuine concentration of activity or heightened public awareness is debated, but the pattern of sightings along the volcanic spine of the Pacific Northwest was well-established by 1949.
The Mount Hood area was remote enough that air traffic was limited, primarily consisting of commercial flights at high altitude on established airways and occasional military aircraft from Portland-area bases. The object observed on this occasion did not match any known traffic.
Project Grudge — the successor to Project Sign and the predecessor to Blue Book — was the investigating body at the time. Grudge was generally more dismissive of UFO reports than Sign had been, operating under the assumption that most sightings had conventional explanations. Despite this institutional bias, Case #496 could not be resolved and was carried forward as "Unknown" when Blue Book inherited the files in 1952.