Riverstar

River is a silvery gray tom with long fur and green eyes.

Secrets of the Clans

 * He was the founder and the first leader of RiverClan. He worked with Thunder, Wind, Sky and Shadow to develop the warrior code. It was thought that he was the cat who thought up a mentoring program of training apprentices. He was known to be generous and warm-hearted with his own Clan, but not interested in the other Clans' troubles. It is unknown how he died.

Long Shadows

 * River met with the other ancient leaders, Shadow, Thunder and Wind to discuss the loner Sol with Midnight. River didn't want to come to the meeting in the first place, remarking "What are we doing here?"

Erin Hunter Chat

 * In an Erin Hunter Chat, Vicky revealed that Sky, Thunder, Shadow, River, and Wind did not take "-star" on the end of their names, because the tradition had not yet been established in their time.