Fade to Silence

Wolves are found by cleansing nests, (not all will give you a wolf, which is shown via a short cutscene of a wolf being spat out of the cleansed nest. so may be random as to when and where). You'll also need to build the Sledding Kennel at the refuge to gain access to the sleds. Once you have 6 wolves, simply use a sled at any outpost, or summoning crystal if you're out in the middle of nowhere, and hop on the sled to pop the achievement.