We’re now in the final year of a decade, and it’s hard to believe that it has been nearly 20 years since the 20th century came to an end. Time sure has flown by! While the world has changed quite a bit over the last 10 years, it’s incredible to consider how much has changed over the last 100. This got us wondering just what Colorado looked like a century ago, so we turned to our friends at History Colorado and found these 20 stunning photos of the Centennial State during the 1910s.

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For even more historic Colorado photos, check out our previous article: These 13 Rare Photos Show Denver’s Railroad History Like Never Before.

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