The Northwest Passage was a region of space located in Borg territory. By 2373, this area of Borg space did not have any Borg activity which prompted the USS Voyager into considering travelling through the Northwest Passage which they had named. However, as they approached this space they discovered that the location was filled with ships belonging to Species 8472 who were arriving through a series of quantum singularities. (VOY episode: "Scorpion")