Figure D6 is a State map of Colorado showing substate region definitions in terms of counties.
The substate region referred to as Regions 1 and 4 is made up of county/counties Alamosa, Baca, Bent, Cheyenne, Conejos, Costilla, Crowley, Elbert, Huerfano, Kiowa, Kit Carson, Larimer, Las Animas, Lincoln, Logan, Mineral, Morgan, Otero, Phillips, Prowers, Pueblo, Rio Grande, Saguache, Sedgwick, Washington, Weld, Yuma.
The substate region referred to as Region 2 is made up of county/counties Adams, Arapahoe, Clear Creek, Denver, Douglas, Gilpin, Jefferson.
The substate region referred to as Region 3 is made up of county/counties Chaffee, Custer, El Paso, Fremont, Lake, Park, Teller.
The substate region referred to as Regions 5 and 6 is made up of county/counties Archuleta, Delta, Dolores, Eagle, Garfield, Grand, Gunnison, Hinsdale, Jackson, La Plata, Mesa, Moffat, Montezuma, Montrose, Ouray, Pitkin, Rio Blanco, Routt, San Juan, San Miguel, Summit.
The substate region referred to as Region 7 (Boulder) is made up of county/counties Boulder.