Trekking Poles Lightweight and collapsible poles are recommended. Larger baskets work well with deep snow. Ski poles will also work. Trekking Poles on Rainier Trekking poles help balance and stabilize a heavy pack during the approach. They also help take some stress off of the knees during the descent. Locking Carabiner You will need one triple action locking carabiner; used for clipping into the climbing rope. Triple Action Carabiner A triple action carabiner is a locking carabiner that requires three steps to open: 1) lifting the lock, 2) twisting the lock, and 3) pushing the gate open. It then \"auto-locks\" when the gate is released. The three-step to open and auto-locking to close actions make them safer than standard screwgate locking carabiners as they are unlikely to inadvertantly move to the open position during the climb. For this reason, we require that all climbers use a triple action locking carabiner to tie into the rope on our climbs. Non-locking Carabiner You will need one non-locking carabiner. Non-locking carabiners have a multitude of uses. They are used for creating anchor systems, crevasse self rescue, a pack ditch loop, etc.