National and State Register Rock Creek Farm Rural Historic District Boulder County The Rock Creek Farm Rural Historic District occupies the southeast corner of Boulder County, a historically rural agricultural area between Denver and Boulder that is experiencing extensive suburban development. co_boulder_rock_creek_farm_rural_historic_district_form-1.pdf National Register Mar 3, 2023 Address 2005 S. 112 St., Broomfield, CO Site Number 5BL.787