Hayden explored western Colorado during the late nineteenth century.

It is considered the largest orchard for the time in western Colorado.

"What's the latest report on our shale oil operation in western Colorado?"

However, newspapers in western Colorado celebrated the end of the frustrating traffic delays.

But he said the industry had the potential to expand in western Colorado, with up to 3,500 acres suitable for vineyards.

In 1865 gold, silver, and coal were discovered in western Colorado.

Shells of dinosaur eggs found in western Colorado are believed to be the oldest ever discovered, researchers say.

Its original borders stretched from western Colorado to the southern California coast.

Its native range is wet areas of western Colorado and northeastern Utah.

There are currently 11 active coal mines, all in western Colorado.