It was 153 years ago today (1861) that Congress organized the Territory of Colorado and stole the Rio Grande headwaters, the San Luis Valley, nine fourteeners, a national park and a big chunk of plains from New Mexico. Colorado was given that part of New Mexico east of the Continental Divide between 37º (the current state line) and 38º (69 miles further north).
In the House version of the bill, the new territory was called Idaho. The Senate changed it to Colorado.
The good news is, two years later, New Mexico Territory gave up what is now Arizona.
So, lose some, win some.