Project Blue Book Case Files

In September and December 1948, a teacher in North and South Colorado observed what he described as a bright green falling star on three separate occasions. The first sighting occu…

On August 26, 1962, at 1845 (6:45 p.m.), just after sunset, a man reported an object over Del Mar Park in Aurora, Colorado. The witness was in the Marine Corps recruiting service.…

On a night in June 1962, a resident of Pueblo, Colorado spotted an object in the sky that dimmed compared to the stars around it. The object appeared as a light with a white vapor…

On April 23, 1962, observers at the U.S. Air Force Academy in Colorado reported one pale white object, possibly with a short trail. The object moved at high speed, estimated at abo…

On November 25, 1961, a witness near Denver, Colorado, reported a strange object in the sky. The sighting happened at 1828 Zulu time, which was night. The object was large and irre…

A T-33 pilot flying east of Grand Junction, Colorado saw a bright object in the night sky in September 1960. The object appeared straight ahead at 30 degrees above the horizon and…

On September 27, 1960, a civilian in Aurora, Colorado, reported objects at 0422 (about 9:22 p.m. local), at night under bright moonlight. The witness saw six round, red or maroon o…

On September 30, 1960, a civilian in Boulder, Colorado, reported an object at 0840 (about 9:40 p.m. local), at night under a bright, clear sky. The witness, who had radar and elect…

On a September night in 1960, an observer in Englewood, Colorado saw a white light moving overhead in ways that seemed unlike any aircraft. The object stopped in mid-flight and cha…

On September 29, 1960, civilian observers in Colorado and New Mexico reported seeing an unusual flying object. People at the Federal Aviation Administration stations in Grand Junct…

On the morning of June 4, 1960, a Canadian tourist visiting Leadville, Colorado witnessed something unusual in the sky. Between 0620 and 0730 (6:20 a.m. and 7:30 a.m.), the observe…

On August 20, 1960, an observer in Littleton, Colorado watched what appeared to be a tear drop-shaped object about the size of a basketball for twenty to thirty minutes. The object…

On June 17, 1960, a witness near Littleton, Colorado, saw a bright object in the sky. The card lists one object moving rapidly. The time was about 8:40 p.m. local time. The object…

In February 1959, a photographer standing on Flagstaff Mountain near Boulder, Colorado, took what he thought was an ordinary scenic picture. When the film was developed, a white bl…

In June 1959, a woman in Lyons, Colorado, reported seeing an unusual bright orange object in the sky. The witness described the object as circular with sharp, clearly defined edges…

On February 1, 1958, at Camp Carson, Colorado, a civilian reported seeing four distinct parallel lines burning like flares and pointing downward. The object was about the size of a…

On the evening of August 31, 1958, a civilian businessman in Denver, Colorado saw three reddish-orange objects about the size of a baseball moving in an almost straight line across…

Between September 18 and October 20, 1958, a civilian in Derby, Colorado, took a 35mm color slide of a B-47 vapor trail in a southwest direction from his home. When he later projec…

On April 3, 1958, shortly after sunset near Lowry Air Force Base in Colorado, two experienced Air Force officers spotted an unusual object moving smoothly across the northwestern s…

On the morning of June 14, 1958, a weather observer at Pueblo, Colorado spotted an unusual object while tracking a pilot balloon with a theodolite (a surveying instrument used to m…

On March 9, 1957, at dusk, a civilian in Colorado Springs, Colorado reported observing two objects that appeared to be connected and floating. The witness said the objects looked l…

On January 16, 1957, a civilian observer in Glenwood Springs, Colorado reported seeing one circular, clear, bright light in the sky. The object was described as small and orange an…

On October 6, 1957, at 1:05 p.m., a civilian in Kremmling, Colorado reported seeing a round object about the size of a quarter at arm's length. The object was red at first, then ch…

In July 1957, a rancher working about six miles west of Longmont, Colorado observed an unusual craft hovering in the early morning sky. He was raking hay south of his farmhouse whe…

On May 2, 1957, at about 11:30 p.m. local time, a civilian near Denver, Colorado reported a sighting. The witness was a technical motion picture writer based in Orlando, Florida. T…

On August 22, 1957, around 2320 (11:20 p.m.) local time at the Pueblo Airport in Pueblo, Colorado, a control tower operator saw two round white objects through binoculars. Each was…

On the evening of June 24, 1957, a resident of Villa Grove, Colorado spotted an unusual object in the sky while standing near a highway. The witness described the object as round a…

On August 5, 1956, at 6:04 a.m. local time, one mile east of Denver, Colorado, a civilian observer reported seeing six round, pale orange colored objects flying in an approximate t…

On May 9, 1956, a civilian in Colorado Springs, Colorado reported seeing one round object about the size of a small pea held at arm's length. The object was fluorescent white and s…

On September 27, 1956, an observer near Colorado Springs, Colorado reported one round, bright object with an orange tinge and a blurred outline. It had an orangish tail about twent…

On October 1, 1956, in Colorado Springs, Colorado, two military and civilian witnesses observed one round flashing red and green object for two hours. The object appeared similar t…

On August 18, 1956, a civilian in Colorado Springs, Colorado, reported a single object. The sighting was recorded at 1020Z and lasted about four minutes. It was still visible when…

On September 27, 1956, a civilian near Craig, Colorado reported about fourteen lights arranged in a string. The lights were uniform in spacing and looked like a row of cabin lights…

On August 28 to 30, 1956, a civilian in Crestone, Colorado, reported a single object on several nights. On August 28 it was watched for about one hour and fifty-nine minutes and wa…

On September 1, 1956, a civilian in Denver, Colorado, reported a single object. The sighting was recorded at 0310Z and lasted about one hour and ten minutes. The witness described…

On August 21, 1956, at about 11:50 a.m., a civilian in Denver, Colorado observed one object in the sky. The object was oval or shaped like a coffee saucer and appeared white. At fi…

On October 4, 1956, a civilian near Denver, Colorado reported one round, red object about the size of a pen held at arm's length. The object was seen to the west of the observer at…

On the evening of December 31, 1956, a resident of Denver, Colorado watched two round objects in the night sky through binoculars and a telescope. Both objects were tiny, about the…

On August 22, 1956, a civilian in Fountain, Colorado, reported a single object. The sighting was recorded at 1050Z and lasted about thirty-five minutes. It disappeared after sunris…

# Summary On the evening of September 24, 1956, a witness in Fort Collins, Colorado saw an unusual object in the sky. The object appeared round, about the size of a baseball, and…

On August 1, 1956, a civilian observer in Hosperus, Colorado reported seeing one yellowish funnel-shaped object. The observation was ground-visual. The object appeared stationary a…

On December 2, 1956, near Hugo, Colorado, a civilian observer reported seeing three white to yellowish lights. The objects appeared as one object that graduated in size from pea to…

On the nights of September 1, 2, and 3, 1956, observers near Peyton, Colorado reported lights in the sky starting around 7 p.m. local time. Watchers used binoculars and saw the obj…

On October 1, 1956, at 2:53 a.m., a civilian in Pueblo, Colorado reported observing one round object resembling a star with a cream color. The object was approximately the size of…

On August 29, 1956, a military witness in Pueblo, Colorado, reported a single object. The sighting lasted about two hours and twenty-one minutes. The witness described one round o…

On September 1, 1956, a civilian ground observer in Pueblo, Colorado, reported four objects. The sighting was recorded at 0513Z and lasted about two hours. The witness described f…

On August 11, 1956, in Pueblo, Colorado, a civilian observer reported seeing six to eight objects with greenish glow in a very formation. The objects were about the size of a half…

On November 12, 1956, at Rocky Ford, Colorado, a civilian observer reported three objects about the size of a dime, colored red, yellow, and green, arranged in a stationary formati…

On May 29, 1955, both civilian and military witnesses in Colorado Springs, Colorado reported one object. It was reported by phone to the duty officer at the headquarters of an Air…

On March 22, 1955, in Colorado Springs, Colorado, a civilian reported seeing a circular, bright purple object about the size of a baseball. The object descended to the ground with…

On December 11, 1955, over Colorado Springs and Denver, Colorado, three people saw one object in the sky. The Greenwich time was 1330Z. The witnesses included military and civilian…

On November 25, 1955, near La Veta, Colorado, a man saw a strange object in the daytime sky. The time was about 1030 (10:30 a.m.). The sky was clear with an unlimited ceiling and n…

On April 27, 1955, a civilian woman in Manitou Springs, Colorado saw a shining object. She watched it from the back porch of her house. The object appeared to hover over nearby hil…

On December 1, 1955, near Pueblo, Colorado, a man and his wife saw a strange object while driving about 29 miles south of Pueblo. The time was about 1500 (3:00 p.m.). There were no…

On April 1, 1954, in Colorado Springs, Colorado, a military witness observed an object traveling north in a straight and level course at extremely high speed. The sighting lasted 1…

On July 9, 1954, military and civilian observers at and near Lowry Air Force Base in Denver, Colorado, watched several small, bright objects moving across the sky at extremely high…

On the night of June 23, 1954, a civilian woman in Denver, Colorado, saw a glowing object while standing in her back yard. The object had swept back wings, like a modern aircraft.…

On July 9, 1954, military and civilian witnesses near Lowry Air Force Base in Denver, Colorado, reported shining specks high in the sky. The sighting lasted about 35 minutes. Witne…

On April 19, 1953, at about 1630 (4:30 p.m.) Mountain time, a civilian woman reported an object near Grand Valley, Colorado. She was driving near an oil shale plant on her way from…

On the evening of October 19, 1953, four airmen at Lowry Air Force Base in Colorado reported seeing an unidentified bright object moving across the sky. The witnesses were statione…