The mountains
The mountains are part of the address.
Colorado has the highest average elevation of any state, and more peaks above 14,000 feet than anywhere else in the country. The Continental Divide runs the length of it, the plains run straight into the peaks along the Front Range, and the light on a clear morning is its own reason to look west.
It shapes ordinary life. Which way the water drains, where the wildfire risk is, how the snow loads a roof, and how far you'll drive to the far side of a pass are all mountain questions before they're paperwork ones.