Known locally as “Slimy Slim” or “Sharlie,” this lake monster has been sighted in Payette Lake since the 1920s. Described as a 30–40 foot serpent-like creature with a dinosaur-shaped head, it was first widely reported by a group of townsfolk in 1944. Modern witnesses still claim to see a long, dark shape surfacing near boats, making Sharlie Idaho’s answer to Nessie.