Boulder is the home rule municipality that is the county seat and the most populous municipality ofBoulder County, and the 11th most populous municipality in the U.S. state of Colorado.The population of the City of Boulder was 97,385 at the 2010 United States Census.
On November 7, 1861, legislation was passed making way for the state university to be located in Boulder,and on September 20, 1875, the first cornerstone was laid for the first building (Old Main Building) on the C.U. campus. The university officially opened on September 5, 1877.Boulder adopted an anti-saloon ordinance in 1907. Statewide prohibition started in Colorado in 1916 and ended with the repeal of national prohibition in 1933.