Black Hawk, Colorado, is a historic home rule municipality and the least populous city in the state, known for its origins during the 1859 gold rush. The city flourished during the mining boom of the late 19th century and has seen a revival since the establishment of casino gambling in 1991, leading to significant competition with nearby Central City. In 2010, Black Hawk implemented a controversial ban on bicycles, citing safety concerns amid increased traffic from casino patrons.