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

Deep under California's Sierra Nevada Mountains, Earth is putting on a spectacular geological show—the planet's crust is literally peeling away! This process, called lithospheric foundering ...

California's Sierra Nevada mountains are the state's largest mountain range, full of outdoor adventure and picturesque destinations. Running 400 miles from north to south, and varying between 50 ...

The mountain yellow-legged frog was once the most abundant amphibian in Southern California's Sierra Nevada and Transverse Ranges. Just decades ago, it was hard to walk around many of California's ...