A global tree climbing competition made its way to the hostess city. The International Society of Arboriculture’s (ISA) ...

Sillett’s group put a line over the President’s crown, rigged climbing ropes into position (with special protectors for the tree’s cambium), donned harnesses and helmets, and went up.

After getting suited up, instructors showed them how to tie a rope and connect it to their harness. They were also taught the ...

Some scale the spire from the valley floor as an all-day or overnight effort, but most climbers hike up the Yosemite Falls ...