
Eagle County
Eagle County covers 1,701 square miles and makes up 25% of the region. Incorporated towns in Eagle County:- Town of Avon
- Town of Basalt(partially in Eagle County, partially in Pitkin County)
- Town of Eagle
- Town of Gypsum
- Town of Minturn
- Town of Red Cliff
- Town of Vail
Grand County
Grand County covers 1,869 square miles and makes up 28% of the region. Incorporated towns in Grand County:- Town of Kremmling
- Town of Hot Sulphur Springs
- Town of Granby
- Town of Grand Lake
- Town of Fraser
- Town of Winter Park
Jackson County
Jackson County covers 1,613 square miles and makes up 24% of the region. Incorporated towns in Jackson County:Pitkin County
Pitkin County covers 975 square miles and makes up 14% of the region. Incorporated towns in Pitkin County include:- City of Aspen
- Town of Basalt(portion in Pitkin County; portion in Eagle County)
Summit County
Summit County covers 619 square miles and makes up 9% of the region. Incorporated towns in Summit County:- Town of Blue River
- Town of Breckenridge
- Town of Dillon
- Town of Frisco
- Town of Montezuma
- Town of Silverthorne