Water Monster reports in Montana
3 cases, best-documented first. Page 1 of 1.
We map claims, not creatures. A case is what some source says someone saw or heard, with the link to that source. It is not proof that anything was there, and a retelling counts once, not as a second sighting.

Water Monster · Flathead County, Montana · 1983
Six boaters reported seeing a giant fish between 25 and 30 feet long break the surface of Flathead Lake and cross in front of their boat.

Water Monster · Flathead Lake, Montana · 1937
A fisherman reported seeing a mysterious "thing" swimming in Flathead Lake from the bridge at its south end.

Water Monster · Flathead Lake, Montana · 1951
Realtor J. F. McAlear reports that the 'Big Fish' in Flathead Lake is much larger than previously reported, measuring 11 to 20 feet long and weighing up to a ton.