The Jeffrey pine, one of the iconic trees of the Sierra Nevada, appears to have eclipsed other pines to become the ...

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

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.

The Jeffrey pine grows in upper montane areas throughout the Sierra Nevada and is the most common tree found around Lake Tahoe and Mammoth Lakes. It is not considered a traditional subalpine tree ...

This story appears in the December 2012 issue of National Geographic magazine. On a gentle slope above a trail junction in Sequoia National Park, about 7,000 feet above sea level in the southern ...

“There are many, many years of leaves and broken trees and they’re like ... Included is about $31 million each for the Sierra ...

An executive order issued Friday directs federal personnel to increase timber quotas by 25% on 113 million acres of national ...

The Colombian Ministry of Environment leads the Müse'si conservation project in the Sierra ... Nevada de Santamarta, together with the Arhuaca indigenous community, which involves planting ...

UC Davis Professor Hugh Safford was hiking for pleasure in California's High Sierra when he stumbled upon a new elevation ...