A peak in the middle background is Needham Mountain, where another Jeffrey pine was observed at very high elevation, underlining that this is not simply an anomaly on Mount Kaweah. (Hugh Safford, UC ...

Pinus contorta is prolific throughout the Cascades and the Sierra Nevada and extends to southern California. It is a pine tree of the mountains and grows to an elevation of 11,000 feet.

Earth’s oldest, knotted and scarred pine trees are a boon for forest ... different areas of the Spanish Pyrenees mountains. The duo calculated the trees’ ages based on tree trunk girth.

including this 1500-year-old [bristlecone] tree that had succumbed. I’m no beetle expert, but it looked to me like possibly mountain pine beetle had infected it,” Kitchen said. “There were ...

For more than 5,000 years, a stand of whitebark pine trees in the Beartooth Mountains were preserved in an ice patch. During an ancient warm period, the trees had grown at an elevation above ...

The resulting outbreak painted expanses of green mountains reddish-orange and gray as the beetles killed countless pine trees across the region. Colorado’s popular recreation areas were hit ...

Ten thousand feet up in the White Mountains of central California ... article misidentified the species of tree shown. It was a single-leaf pinyon pine, not a bristlecone pine.

As you might be aware, El Paso County and much of Colorado is seeing an uptick in mountain pine beetle (MPB) activity. MPB is a native insect that usually attacks weaker trees as part of a natural ...