An exotic fungus spreading southward through Rocky Mountain forests is threatening Colorado’s oldest trees — the gnarled limber and bristlecone pines that can live longer than 2,000 years.

A few things on this planet are old enough to make history books look recent, and that includes some living trees that have ...

The Rocky Mountain bristlecone pine is famous for its longevity. The oldest known living specimen, near Pikes Peak, is 2500 years old. Native to Colorado, Bristlecone pines grow in some of the ...

The West's ancient and resilient bristlecone pines have appeared immune to bark beetle infestations devastating conifer forests. That changed when bristlecones began dying in Utah's Wah Wah Mountains.

Rocky Mountain bristlecone pine and limber pine are both five-needled trees that are adapted to growing in rocky and windy environments. At a distance, they look like cartoon Christmas trees, ...

They found 12 living Rocky Mountain bristlecone pines that were more than 1,600 years old and four that were more than 2,100 years old. CB-90-11 was the oldest identified, with a minimum age of 2,435.

The Methuselah Trail, located in Inyo National Forest near Big Pine, California, was recently named one of the best hikes in ...

Ten thousand feet up in the White Mountains of central California, in a harsh alpine desert where little else survives, groves of gnarled, majestic Great Basin bristlecone pines endure, some for ...