USAF · 1947 to 1969
Project Blue Book Case Files
The U.S. Air Force's 22-year investigation into reported UFO incidents, drawn from the National Archives. Each case below has a journalistic summary written from the original file. Use the search box to find a place or date, or filter by state and year.
72 cases in CO · page 2 of 2
CAMP CARSON, CO
1952 · unidentifiedOn December 24, 1952, at 5:17 a.m., observers at Camp Carson, Colorado, sighted a silvery unidentified flying object. The object appeared circular, about the size of a baseball, an…
COLORADO SPRINGS, CO
1952 · unidentifiedOn December 11, 1952, an Air Force sergeant and a civilian observed a round, aluminum-colored object flying from east to west near Colorado Springs, Colorado. The object appeared t…
Denver, CO
1952 · unidentifiedOn September 24, 1952, Technical Sergeant Billy Ross Hughes saw five or six circular objects wheeling through the sky over Aurora, Colorado, just north of Stapleton Airport. The ti…
Buena Vista, CO
1951 · unknownOn October 28, 1951, near Buena Vista, Colorado, a witness reported a single object in the sky. The sighting lasted about 30 seconds. The object was a greenish-blue light moving fr…
Four Corners, CO
1951 · unknownOn October 30, 1951, about 1930 (7:30 p.m.), a civilian artist and a companion in the Four Corners area saw a bright object in the sky. The Four Corners area marks the meeting poin…
Colorado Springs, CO
1949 · unknownOn the afternoon of April 15, 1949, three military personnel at Peterson Air Field in Colorado Springs spotted two round, bright objects moving rapidly across the sky. The sighting…
Delta, CO
1949 · unknownIn April 1949, a former U.S. Air Force pilot living near Merced, California reported experiencing a striking encounter late one night. According to his witness statement, he was st…
Denver, CO
1949 · unknownOn April 6, 1949, at approximately 8 p.m., two motorists parked in the lot at Stapleton Airport in Denver, Colorado, sighted a bluish-white light moving eastward across the sky. Th…
Denver, CO
1949 · unknown# A Colorado Springs Sighting On August 20, 1949, an Air Force civilian employee reported seeing an unusual aircraft near Denver, Colorado. The man watched the object for about tw…
Manitou Springs, CO
1949 · unknownOn the morning of August 8, 1949, a man near Manitou Springs, Colorado, reported an unidentified object above a ridge between Cameron's Cone and Mount Arthur, west of Colorado Spri…
Tioga, CO
1949 · unknownIn the afternoon of June 9, 1949, a farm hand working near Tioga, Colorado spotted five brownish, round objects flying in formation at roughly 20,000 feet. The witness, who had ser…
Moffatt, CO
1948 · unknownIn southern Colorado in 1948, a civilian named Harold M. Wright reported seeing a "green fireball" on three separate nights. The dates were September 12, December 5, and December 1…
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