Scientist finds Jeffrey pine trees at record mountain heights, suggesting climate-driven shifts in Sierra Nevada.

The Bug That’s Eating the Woods.” “Small Pests, Big Problems: The Global Spread of Bark Beetles.” “Eighty-Nine Million Acres ...

A UC Davis professor's pleasure hike in the High Sierra turned into a new elevation record for California's highest tree, the ...

A professor's casual hike in the High Sierra turned into a new elevation record for California's highest tree, the Jeffrey pine, which wasn't formerly known to grow at extreme elevations.

Take a look at snow totals, and see pictures from across the region from the spring snowstorm that impacted southern Colorado ...

Explore trails in British Columbia that criss-cross Canada’s most spectacular mountain range — whatever your level of ...

I picked up a road burrito at Alpha Coffee and headed up Little Cottonwood Canyon. Earth Day is coming Tuesday, April 22, but Alta Ski Area always gets into the action early. And what better a place ...

Monarchs traveled to a remote part of Mexico, a journey they've made for thousands of years, and wintered there. Now tens of millions of the butterflies are on an epic aerial journey back north.