Champion Mill, in Lake County, Colorado, is part of a mining complex on the eastern slope of Mount Champion on Halfmoon Creek. Established in the 1890s, it was a consistent supplier of gold and silver, as well as galena and pyrite to the smelters in Leadville, CO. The mine and mill operated until around 1919, when the price to ship the ore to Leadville becam…Champion Mill, in Lake County, Colorado, is part of a mining complex on the eastern slope of Mount Champion on Halfmoon Creek. Established in the 1890s, it was a consistent supplier of gold and silver, as well as galena and pyrite to the smelters in Leadville, CO. The mine and mill operated until around 1919, when the price to ship the ore to Leadville became too expensive to maintain a profit. It was briefly reopened between 1937-40, when it finally shut down for good. During it's lifespan, the mine produced than 100,000 thousand pounds of minerals.