“Alpine rock climbing is a serious endeavor that requires ... and their effect on route conditions, and to perform self-rescue techniques in stressful situations.” On Sept.

When two hikers took a long tumble off the Tahquitz Mountain Trail, it was the beginning of an epic ordeal for them and their rescuers.

In some cases, self-rescue was possible ... of hitting the trails might not seem as extreme as base jumping or rock climbing, the reality is that remote environments present unique risks that ...

And it’s a lot of material to move. Hydraulic or self-climbing forms have evolved out of this situation because there isn’t enough time in the day—or in the construction cycle—for the ...