The environmental justice advocate, scientist and native Angeleno became director of Sierra Club California on Tuesday, just as rumors began swirling among environmental groups that President Donald ...

More than 15 million tourists from around the globe travel to California each year to visit its world-famous theme parks, ...

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

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

The decaying nature of ancient and veteran trees is one of their key characteristics because of the microhabitats they offer ...

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