List of National Historic Landmarks in Colorado

Columns: Landmark name | Date designated | Location | County | Description
1 | Bent 's Old Fort | December 19 , 1960 ( # 66000254 ) | La Junta 38°02′34″N 103°25′51″W / 38.042886°N 103.430786°W / 38.042886 ; -103.430786 ( Bent 's Old Fort ) | Otero | Adobe fort built in 1833 to trade with Plains Indians and trappers , on Santa Fe Trail | 2 | Central City/Black Hawk Historic District | July 4 , 1961 ( # 66000246 ) | Central City and Black Hawk 39°48′04″N 105°30′27″W / 39.801111°N 105.5075°W / 39.801111 ; -105.5075 ( Central City/Black Hawk Historic District ) | Gilpin | Former gold mining camps in the Front Range of the Rocky Mountains , once known as the ' Richest Square Mile on Earth | 3 | Colorado Chautauqua | February 10 , 2006 ( # 78000830 ) | Boulder 39°59′52″N 105°16′50″W / 39.997778°N 105.280556°W / 39.997778 ; -105.280556 ( Colorado Chautauqua ) | Boulder | This 1898 Chautauqua is the only one West of the Mississippi , one of only four continuously operating since its inception , and the only one open year round | 4 | Cripple Creek Historic District | July 4 , 1961 ( # 66000939 ) | Cripple Creek 38°45′07″N 105°10′31″W / 38.751944°N 105.175278°W / 38.751944 ; -105.175278 ( Cripple Creek Historic District ) | Teller | The gold mining town of Cripple Creek and the surrounding hills | 5 | Denver & Rio Grande Railroad San Juan Extension ( Cumbres & Toltec Scenic Railroad ) | October 16 , 2012 ( # 73000462 ) | Antonito , CO and Chama , NM 37°00′22″N 106°17′44″W / 37.006048°N 106.295485°W / 37.006048 ; -106.295485 ( Denver & Rio Grande Railroad San Juan Extension ) | Archuleta , CO , Conejos , CO , and Rio Arriba , NM | Longest & most complete representation of late nineteenth- and early twentieth-century railroading | 6 | Denver Civic Center | October 16 , 2012 ( # 12001017 ) | Denver 39°44′21″N 104°59′12″W / 39.739237°N 104.986753°W / 39.739237 ; -104.986753 ( Denver Civic Center ) | Denver | City Beautiful -era civic center | 7 | Durango-Silverton Narrow-Gauge Railroad | July 4 , 1961 ( # 66000247 ) | Durango to Silverton 37°17′51″N 107°42′39″W / 37.2975°N 107.710833°W / 37.2975 ; -107.710833 ( Durango-Silverton Narrow-Gauge Railroad ) | San Juan and La Plata | Narrow gauge mining railroad which has continued to serve as a tourist line between Durango and Silverton

Example questions:
What is the architectural style of the Coloradan National Historic landmark building in the city located directly over the longitudinal reference for the Mountain Time Zone ? | During which epoch was the distinctive geology of the county with a 2010 population of 534,543 formed ? | What is the width , in mm , of train tracks in the Coloradan National Historic landmark whose town derives income from maintenance of US 550 ? | Which culture built the Coloradan National Historic site , now in ruins , in zip code 81331 ? | What is the current name of the area that includes artifacts of similar to those found by George McJunkin in about 1908 ?

Answers:
Neoclassical | Pennsylvanian | 914 | Puebloan | Soapstone Prairie Natural Area