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By Act of Congress, on August 1, 1876 because of Gold! The 1858 discovery of gold caused a population boom, just like it did in California 10 years previous. The miners found other profitable minerals as well and continued to mine for many years. As late as the 1940s, mountain streams in Ouray County ran yellow because of the residue (tailings) from the gold mills. Settlers also discovered Colorado's exquisite natural beauty.

On August 1, 1876, President Ulysses S. Grant issued the proclamation of statehood. Colorado was the 38th state to join the Union.

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8y ago

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