The Tribe of Rushing Water is a group of mountain cats. Tribe Cats are mostly smaller and leaner than Clan cats, and smear their fur with mud to camouflage them, blending in with the rocks. It also helps them to keep warm at higher altitudes, and can be a coating. Their camp is located at the end of a rocky path that leads behind the waterfall, screening them from the outside. The cave, which burrows under the mountain, is as wide as the waterfall, and has narrow passages that lead off on either side. One passage goes to the Cave of the Pointed Stones, and the other goes to the nursery. On either side of the cave floor, there are indents, padded with eagle or heron feathers, that the Tribe cats sleep in. The herbs and healing techniques that the healer uses are different than that of the Clans.

The Tribe of Rushing Water came to be because of Jay's Wing, who named Half Moon as the first Stoneteller. She is a white she-cat with emerald-green eyes