How Colorado became a state in 1876

• Colorado was a territory for 15 years before earning statehood.

Yes, but: It took a while before the date became a celebration.

• The original commemoration in 1907 was sponsored by a group called the Sons of Colorado. A massive parade, including floats and an ox team, was planned in Denver, according to Denverite.
• The same year, the state legislature passed a bill officially recognizing the day.

Flashback: President Andrew Johnson, Grant's predecessor, rejected Colorado's statehood bid in 1867, citing its small population.

Of note: To commemorate, all 42 state parks are free to the public today.