With spikes on his shoes, a helmet on his head, a rope on his harness, and a chainsaw on his belt, Ken Gragg starts to climb.

Saying that a recent tree-climbing school was hands-on is a bit of an understatement. As an arboreal activity that requires a whole-body commitment, the course held Aug. 12-15 by Penn State Extension ...

ROCHESTER — Arborist Eric Raven is bringing tree climbing and safety training under a roof with his new Treehouse center, which features an indoor “forest” in northwest Rochester. Raven, who also owns ...