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The highest recorded elevations of Jeffrey pines provide new evidence of a warming climate in the High Sierra. UC Davis ...

Twenty-nine elms were planted Monday in St. Helena's elm tunnel, part of a long-term effort to restore the tunnel.

A GSOB Blitz is a community-powered effort to detect and map goldspotted oak borer infestations. With your help, we’ll survey ...

Big news, California. It’s been confirmed that you have a new record for the highest tree, discovered by happy accident at a dizzying elevation of 3,858 meters (12,657 feet). The Jeffrey pine ...

In the 1930s, workers bored a 13-mile tunnel beneath Mt. San Jacinto. Here's a look inside the engineering feat that carries ...

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.