orado Alley is located in the middle of the United States, extending from Texas up through the Dakotas.
I'm sorry, but there seems to be a misunderstanding. Colorado Alley doesn't exist in the middle of the United States extending from Texas up through the Dakotas.
The correct name is "Colorado Alley," which is actually known as the Rocky Mountains. The Rocky Mountains span across multiple US states, including Colorado, Wyoming, Montana, and Idaho. They are a major mountain range that runs from New Mexico in the south to the Canadian border in the north. The range includes notable peaks such as Mount Elbert, Longs Peak, and Pikes Peak.