Other Aquatic reports in Colorado
2 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.

Other Aquatic · Colorado · 1869
A belief in monsters in Sagaske lake prevails among Mexicans and Americans who claim the animals devour cattle.

Other Aquatic · Colorado · 1855
Black Ben reports seeing a hairy, horned creature with a human-like face in the river near an island, which made a terrifying noise before submerging.