Hidden along a scenic trail in California's northern wilderness, this waterfall lets you walk behind its thundering cascade through a natural cave.

The column from April 25 in which I described pest threats to our trees sparked a lot of interest.

The emerald ash borer eats into the bark of ash trees and leaves D-shaped holes. Debbie Miller / U.S. Forest Service. Matt Mills, an emerald ash borer support specialist with the Oregon Department ...

The Oregon State Parks department is facing a 14% budget shortfall in the next biennium, officials revealed to OPB. To avoid cuts, the agency said it’s looking for new business ...

Late afternoon sunlight illuminates the base of a coast redwood along the Redwood Grove Loop Trail at Henry Cowell Redwoods ...

Why some U.S. cities are so much greener than others. Ever since I first visited D.C., I was in awe of how full of trees it was. Rock Creek Park, one of the oldest city parks in the United States ...

A group of tree lovers 125 years ago gathered beneath the leafy canopies of a grove of giant redwood trees in the Santa Cruz Mountains and hatched a plan to protect them from the toothy threat of ...