Released in Denver on May 21, 1977, this 13-cent stamp celebrated a significant milestone in Colorado's history. The journey to statehood was a long one, marked by the Pikes Peak Gold Rush of the late 1850s and the subsequent influx of settlers. After years as a territory, Congress passed an enabling act in 1875, and Colorado officially became the 38th state the following year. The nickname "Centennial State" has been a source of pride for Coloradans ever since. The stamp, designed by V. Jack Ruther, captures the essence of Colorado's natural beauty. The majestic Rocky Mountains form the backbone of the state, influencing its climate, economy, and culture. The delicate Rocky Mountain Columbine (Aquilegia coerulea) was adopted as the official state flower in 1899 after winning the vote of Colorado's schoolchildren. Its blue petals represent the sky, the white cup symbolizes the snow, and the yellow center stands for the state's gold mining history. The issuance of this stamp was a national recognition of Colorado's rich heritage and its stunning landscapes.