ALPINE, Calif. — In an effort to prevent wildfires in at-risk areas ahead of this year’s wildfire season in San Diego, an extensive tree and shrub removal is underway in the East County that clears ...

We all know what tree line is in Colorado: the point above which trees don’t grow. But what determines tree line: Cold? Soil conditions? Precipitation? And is tree line different in various parts of ...

Master the Double Alpine Butterfly with Ring, a versatile knot essential for arborists, tree climbers, rock climbers, alpinists, canyoners, and rescue professionals. Learn step-by-step techniques to ...