The 1990 Montreal UFO Above the Hôtel Bonaventure

On the evening of 7 November 1990, people using the outdoor rooftop pool area of the Hôtel Bonaventure, which sits on top of the Place Bonaventure complex in downtown Montreal, noticed lights in the sky above them. Accounts describe several bright lights arranged in a pattern, or a large object carrying them, that appeared to hang motionless or nearly so over the area. Hotel staff and guests watched, and the police were called.

Officers of the Montreal Urban Community police reportedly went to the scene and saw the lights themselves, and police reports were written. According to accounts of the investigation, the lights were visible for an extended period, often given as a few hours, before they were no longer seen. Other people in the downtown area are said to have reported lights at the same time, although the number and reliability of those additional reports vary between sources.

The sighting was later investigated by Bernard Guénette, a Quebec UFO researcher, who collected witness statements and documentation. The case became one of the best known Canadian sightings because it happened over the centre of a major city, involved police officers, and was not a fleeting glimpse. It has been featured in Canadian UFO literature and television ever since.

The main evidence consists of witness accounts from the hotel, the involvement of police officers, and the police paperwork that followed. The presence of on-duty officers who attended because of a call, rather than people who went looking for a UFO, gives the case more credibility than a typical sighting. Details of what the officers described, such as the size and shape of the lights, differ between retellings, and the original reports are not widely published.

No clear photograph or video of the object is generally accepted as showing it, and no radar confirmation has been publicly documented. Some accounts state that airport or military authorities were contacted and had nothing to report, but the specifics of those contacts are not well documented in public sources and should be treated with caution.

Guénette’s investigation files are the most detailed body of material on the case. Ufologists treat it as a solid multiple-witness sighting. Critics point out that witness estimates of altitude and size are unreliable for lights at night, especially when there is no reference point, and that the reports do not by themselves establish that a physical object was present.

No Canadian authority is known to have published an explanation. The police took reports and the matter was not pursued as a security issue. In common with most Canadian sightings of that period, it was never the subject of a formal government investigation, because Canada had by then no dedicated programme for studying UFO reports.

The absence of an official explanation should not be read as an official confirmation of anything unusual. It reflects a system in which reports were logged and filed but not analysed. Researchers who have looked for further government documents on the case have not produced evidence that any agency concluded the lights were a craft of unknown origin.

One family of explanations is atmospheric. Montreal in November can have low cloud, and lights projected or reflected onto a cloud base can appear as fixed shapes overhead. Searchlights, advertising lights or illumination from events in the city have produced similar sightings elsewhere. Some commentators have suggested an effect of this kind, possibly combined with unusual cloud or temperature conditions, but no specific light source has been identified for that night.

Other suggestions include aircraft holding in patterns for an approach, a balloon or other lit object, or bright astronomical objects seen through breaks in cloud. Each has difficulties: aircraft move and make noise, and planets do not stay in one place for hours. None of these ideas has been tested against weather records and flight data in a way that has been published.

Ufologists argue that the duration, the apparent size and the police involvement point to a structured object. That view is also unproven, since it rests on estimates made by observers looking straight up at lights against a dark sky.