The Capay Valley what-is-it
Mountains at the head of Capay Valley, Yolo County, California approx. · June 1891
For weeks, Yolo County papers ran yarns about a freak of nature in the mountains at the head of Capay Valley, nicknamed the What-is-It. Two more men then said they had followed the creature to its lair.
Probably a hoax or tall tale The Sacramento paper said the story may have been started deliberately.