The Garnet River is a symbol of the indifferent and dualistic nature of the wilderness, as the river, hemmed in on both sides by deep canyon walls, is both a prison and the only path to freedom. It is the physical manifestation of the crucible through which the women must pass. The novel establishes the river’s isolating power from the outset, quoting a fictional primer: “Once you put in at Boundary Creek, there is no road access for over one hundred miles” (10). The river and its canyon form a cage, trapping the characters in a remote and unforgiving environment where civilization cannot reach them. Throughout the journey, the river’s character shifts from a place of majestic beauty that Kaia hopes will bring her closer to Parker’s memory, to a deadly, chaotic force with “unrunnable” rapids and treacherous currents that work in concert with the killer’s plans. This duality mirrors Kaia’s journey of Finding the Will to Live When in Danger; she seeks solace in a place of shared dreams but instead finds a nightmare that forces her to confront her own will to live. The river is impartial, its dangers threatening both the victims and the killer, and survival depends on the women’s ability to read its currents and work with its power, ultimately transforming it from a trap into their escape route.

The story of the original Camas Creek murders is a recurring motif that serves as the narrative blueprint for the unfolding horror, embodying the theme of The Perils of True-Crime Fandom. Initially introduced as a scary campfire tale, the story is a source of morbid fascination for Allie, a true-crime enthusiast who moderates a subreddit about the case. For her, the river is a destination, a piece of living history. However, the motif quickly evolves from entertainment into a terrifyingly accurate prophecy. The missing satellite phone, the screams in the night, and the escape via rafts all mirror the events of seven years prior, revealing that the killer is not just committing murder but is consciously re-enacting a script. This becomes explicit when Leo Marsden, the killer, reveals that his motive is to reclaim the narrative from Kellen Stroop and get public credit for his violent masterpiece. He scoffs at Allie, “You think I’m worried about getting credit for my opus? You dumb bitch. It’s been hard as fuck watching Kellen Stroop get all the glory for the past seven years” (185). This confession reframes the massacre as a performance for an audience, a commentary on how online misogyny can inspire killers who see their violence as a path to infamy.