WinterClan is the Clan living west of the other Clans, having moved closer to the mountains after the old territory was overrun by rats and Twolegs. Despite the move, WinterClan has flourished since the death of Nicholai, its founder, and through the leadership of Hollystar to the current Antstar. Known for their hostile and proud nature, WinterClan is a Clan made up of cats of only the purest bloodlines, most descending from the leader themselves or the founders, although there is the rare occurrence of the Clan allowing outsiders in, especially of another Clan. This Clan's cats are made up of heavy-built cats thick with muscles and fur altogether.
The Clan's territory is mountain-like landscape that makes it hard for outsiders to live or survive in its harsh weather and cruel creatures that call this land home. The Clan is about a week's journey from the other Clans, and nearly a two-day journey to the Gathering place, which leads to the Clan rarely ever showing with very many cats or at all.