U.S. 550 reopened after it was closed in both directions Wednesday morning because a boulder crashed onto the highway near Ouray overnight, according to the Colorado Department of Transportation.

Explore the Rocky Mountain National Park on this all-day trip from Denver or Boulder. Discover the rugged scenery of the Colorado mountains as you weave through small towns and travel over alpine ...

The study, led by CU Boulder, is a coup for proponents of a long-standing theory known as Snowball Earth. It posits that from about 720 to 635 million years ago, and for reasons that are still unclear ...

After a warm fall, Boulder County was struck by a snowstorm which began Tuesday afternoon. According to Ayesha Wilkinson, meteorologist with the National Weather Service, Boulder received between ...

In these uncertain times, you can make a huge impact right here in Boulder... The need for trustworthy, local journalism has never been clearer. Without it, misinformation thrives, and we risk being ...

Vice President Kamala Harris trailed in key battleground states, and her path to becoming the nation’s first female president closed as the night progressed. Here in Boulder County, the results ...

Submitting these scores does not have any added benefit as these scores are not part of the review process. The College of Engineering and Applied Science at CU Boulder is once again offering a ...

The attack in Boulder ended with police detaining an injured suspect at the King Soopers market. The shooting was live-streamed by witnesses and broadcast on YouTube. Among the dead was 51-year ...

The attack at a King Soopers market in Boulder ended when police arrested the lone suspect after exchanging gunfire. Police have not confirmed a motive. The suspect faces 10 counts of murder.