Environment

Colorado mountaineer Hilaree Nelson dies after falling off Mount Manaslu in Nepal

Squeak! Squeak! You can track Colorado’s climate-threatened pikas with a new app

Colorado’s state fish, once considered extinct, is reproducing naturally in native waters

In Washington, Colorado lawmakers seek long-term solutions for the drying West

Colorado is sealing abandoned mines to stay ahead of accidents and amateur explorers

Highly invasive zebra mussel appears in Colorado waters for first time ever

On the Colorado River, growing concern for trout and chub

Rangely is surrounded by a coal mine and more than 1,000 oil wells. What will happen to it when we stop burning fossil fuels?

The Colorado River is drying up — but basin states have ‘no plan’ on how to cut water use

Colorado’s fall leaves may appear more brilliant this year thanks to this summer’s monsoon rains

Heidi Ganahl’s transportation plan would refocus spending on driving and undo some Jared Polis-supported legislation

BLM Director lays out plan for Grand Junction office

Coloradans are so bad at composting, whole truckloads are being rejected and sent to the dump

A heat wave wasn’t the only reason Xcel Energy locked customers out of their thermostats — their largest coal plant broke down

Colorado breaks record for number of drownings, and cooler weather means bigger risks