These lucky hikers spotted a tree trunk that trails off into a hollow tunnel along the forest floor. The curious group ...

is the forest—a riot of intertwined tree trunks, leaves, fern fronds and twigs silhouetted black-on-gray on the clammy shale surface of the tunnel roof. "I had seen fossils before, but nothing ...

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

The U.S. Forest Service is reviewing ways to prevent Spirit Lake from overflowing, including updating or replacing an aging tunnel built to drain the lake after the 1980 Mount St. Helens eruption.