Go on, gripe about the Californians and the Texans. No, really, those two states are, in fact, feeding into Colorado more than most states. However, they're not the only ones. 

A study published by Colorado Department of Local Affairs at the end of 2018 shows that along with California and Texas, Florida, Arizona and even Illinois top the states with the most in-migrants to Colorado, based on the U.S. Census.

The states with the highest number of inmigrants come from the largest states, i.e., California, Texas, and Florida. Additionally, more than 10,000 in-migrants from Arizona and Illinois relocated to Colorado in 2016. - CO Dept. of Local Affairs

Where are Coloradans going? For the most part, no where, because who would want to leave? Ironically, according to the report, we're going to California... and Texas.

'The people leaving Colorado in 2016 primarily relocated to four states, Arizona, California, Texas, and Washington,' the study says.You can see more from the study here.