Boulder (US-CO)

From Stamps of the World
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Boulder is the home rule municipality that is the county seat and the most populous municipality of Boulder County, Colorado, United States. It is the state's 11th most populous municipality; Boulder is located at the base of the foothills of the Rocky Mountains at an elevation of 5,430 feet (1,655 m) above sea level. The city is 25 miles (40 km) northwest of Denver.


Read more @ https://en.wikipedia.org/wiki/Boulder,_Colorado

Postmark Examples

Postmark Boulder, Colorado, 1981.
Glenn Miller Station, second day of issue, 12 Sep 1996