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How to Build a V-Thread and O-Thread Ice Anchor

AMGA Instructor Team Member Patrick Ormond explains how to build a V-thread and O-thread anchor in the ice.

Rappelling on ice, when there are no fixed anchors, requires some skill. You can use ice screws or rock gear if there’s rock, but then you have to leave your gear.

The key to rappelling multi-pitch ice is the V-thread (Abalakov) or O-Thread. While the thought of using ice as a rappel anchor seems scary at first, climbers have been using them safely for decades. The key is finding good ice.

How to Thread It