Colorado’s 10 largest cities:
- Denver
- Colorado Springs
- Aurora (Denver Suburbs)
- Fort Collins
- Lakewood
- Thornton
- Westminster
- Arvada (Denver Suburbs)
- Pueblo
- Centennial
More (tourist) cities:
- Boulder
- Cañon City
- Durango
- Grand Junction
- Loveland
More cities:
- Breckenridge - most popular ski resort in the U.S.
- Aspen - ski town
Abbreviations: CO, Colo.
Six regions:
- Denver and the Burbs (the Suburbs)
- Northern Front Range
- Southern Front Range
- Central Rockies
- Southwest Colorado
- Western Slope
Six regions (Wikivoyage):
- Denver Area
- Eastern Plains
- Front Range
- Northwestern Colorado
- South Central Colorado
- Southwestern Colorado
DMOZ (Regions):
- Central Mountains
- Front Range
- Northeast Colorado
- San Luis Valley
- Southeast Colorado
- Western Slope
- 64 Counties