Reports of the apparent discovery have quickly circulated online, but no pictures or videos have been posted. The National UFO Reporting Center has not confirmed the sighting.

‘There was no mistaking what this was,’ Michael Lehmann, a Red Rocks employee who revealed he saw the eerie phenomenon, said in his report to The National UFO Reporting Center.

Lehmann said he saw mystifying object around 1 am with about a dozen other coworkers, following a concert headlined by the rock band All Time Low.

‘I’m the person who made the original report to the UFO database. I was on the loading dock that night and saw the craft that was hovering,’ Lehmann said in a Reddit post on Saturday.

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He told Out There Colorado that neither he or his coworkers were able to snap a picture or video of the floating metallic object because it disappeared quickly, and they ‘were busy working.’

Lehman discussed his findings with others online and even shared a sketch of what he witnessed.

In the sketch, the employee drew the amphitheater on the left side while a large  UFO hovered in the sky near a hill.

The ‘hopeful skeptic’ said the reported UFO was only visible for about 30 seconds and that it had three levels of windows.

Lehman said that the moonlit sky made it easier for him and his coworkers to spot the suspicious object that hovered over the Hogback Ridge Trail, about a mile from the concert venue.

Though the UFO was visible in the sky, Lehman said that because it was metallic and matte black, it ‘blended in with the sky pretty well.’

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At one point, the group of workers shined a flashlight at the object as it became almost invisible. Lehman said it was as if it was using a ‘cloaking device.’

Lehman hopes that more of his fellow employees will come forward and that security guards at Red Rocks ‘didn’t catch anything.’

‘I’m going to try and talk to all the coworkers who were there and see if I can get them to draw pictures, come forward with their stories,’ he said.

‘We’ve talked about it since then and we all agree that we saw something special that night.’

He said that has ‘been in contact with an investigator’ and that she and another investigator planned to meet him at the amphitheater on Monday to show them where he saw the apparent UFO.

The National UFO Reporting Center told DailyMail.com: ‘It is difficult for us to make a determinative call on whether it was a true alien craft, but the description provided does not correlate with any known man-made object.’

DailyMail.com contacted Lehman for comment.

During a recent episode of the History Channel’s Beyond Skinwalker Ranch, incredible footage showed several ‘UFOs’ spotted in a mysterious ancient canyon where experts claim they have found ‘evidence’ of portals.

Hosts Paul Beban, veteran journalist, and Andy Bustamante, an ex- CIA agent, traveled to Rock Art Ranch, a private cattle ranch in northern Arizona, to investigate the thousands of ancient Native American petroglyphs.

The men spoke with former Navajo Ranger Jon Dover about the ancient rock carvings that show animals, three-fingered creatures seemingly representing extra terrestrials, and what is believed to be portals.

The area, which is deemed sacred, was created by Indigenous people more than 13,000 years ago.

Two cigar-shaped UFOs mysteriously appeared after a ritual was performed – flying at incredibly high speeds during the hour-long show.

Even more activity began to occur after a Native American medicine man beat on a drum, and chanted a slow melodic rhythm causing vibrations.

Both men noticed a drastic temperature drop and the orb-like UFOs changed directions.

One of the several unidentified flying objects was caught on a camera set at ground level, going at an accelerating speed before disappearing from view.