Colorado lawmakers rejected a bill Tuesday that would have required state and local police to intervene when federal immigration agents use...

Colorado sued the U.S. Department of Energy in federal court Wednesday for using emergency orders to keep the Craig Unit 1 coal power plant...

Vegetation draws on groundwater during dry summers, leaving less water for the river and, ultimately, people.

Casey Barrett’s tidy, two-story home on a Westminster cul-de-sac hums with the constant drone of an oxygen pump.“Most of the equipment I...

The Environmental Protection Agency has slapped back six oil and gas air pollution permits to Colorado regulators, saying the state failed t...

Colorado Democrats’ gatherings over the past two weekends to help pick which candidates will be on the party’s primary ballot in June were b...

A committee formed by Gov. Jared Polis to come up with a framework for tweaking a state law regulating “consequential” decision making by ar...

Colorado voters will be asked in November whether the state should prohibit transgender kids from participating in gendered sports that do n...

Tuesday marks the start of a heat wave in Colorado, and many parts of the southwestern U.S., that forecasters say could bring record-high te...

Colorado investigators are still searching for information into the decades-old killing of a girl who was kidnapped from her school and late...

A former Colorado funeral home owner who helped her ex-husband hide nearly 200 decomposing bodies in a building was sentenced Monday to 18 y...

The Colorado Avalanche are ready to move on from a complicated two-game road trip. After a dominating win over the Seattle Kraken, the Avs s...

In a historic labor movement, about 3,800 employees of Swift Beef Co in Colorado walked out on Monday, staging the first strike at a US beef...

Strong wind gusts swept across Colorado over the weekend, leaving thousands without power, road closures and downed trees.

Providing health care to children and pregnant people who would qualify for Medicaid if not for their immigration status will cost Colorado...