The Flathead Lake Monster is a cryptid located in Flathead Lake on the southern top of Rocky Mountain Trench in Montana. The description is similar to the Loch Ness Monster which some have claimed that they are the same creature.
The Flathead Lake Monster is describe to be a large serpent, similar to an eel, with wavy body that spans 20 to 40 feet long. The color is said to be brown to black with gray to black eyes. Some sightings describe the creature to be a giant sturgeon and that the body is very shiny with bowling ball shaped head. The first reporting was in 1889 by James C Kerr.