On January 5, 1859, during the Colorado gold rush, prospector George A. Jackson discovered placer gold at the present site of Idaho Springs, where Chicago Creek empties into Clear Creek. It was the first substantial gold discovery in Colorado. Jackson, a Missouri native with experience in the California gold fields, was drawn to the area by clouds of steam rising from some nearby hot springs. Jackson kept his find secret for several months, but after he paid for some supplies with gold dust, others rushed to Jackson's diggings. The location was originally known as "Jackson's Diggings". Once the location became a permanent settlement, it was variously called "Sacramento City", "Idahoe", "Idaho", "Idaho City", and finally "Idaho Springs".