Boulder/Main article

Boulder is a big and skinny gray tom with a torn, ragged ear.

Boulder was an elder of ShadowClan, formerly a rogue and member of BloodClan. He and Russetfur joined ShadowClan as apprentices after witnessing the honor in the warrior code, and Boulder trained under Mousewing, though he chose to keep his rogue name. As a warrior, he mentored Wetfoot; after retiring, he took part in the Great Journey and lived out the rest of his days in the lake territories.

The Prophecies Begin

 * Boulder is a ShadowClan warrior mentoring Wetpaw. When Tigerstar takes over ShadowClan, he asks Boulder to introduce him to Scourge, leader of BloodClan, so that he could recruit his cats as forces against the other Clans. Boulder is apprehensive about trusting them, and Tigerstar is ultimately killed by Scourge. Afterwards, Boulder joins LionClan and takes part in the battle against BloodClan.

The New Prophecy

 * Now an elder, Boulder is mentioned by ShadowClan's new leader, Blackstar, when the Clan leaders are discussing where to go when the Twoleg's destruction makes the forest uninhabitable. Blackstar reports that ShadowClan plans to take over BloodClan's old territory, and that Boulder would guide them there. However, ShadowClan is persuaded to join the other Clans on the Great Journey.

Super Editions

 * In Yellowfang's Secret, Boulder is a rogue living in Twolegplace. After a battle with ShadowClan, he and Red, impressed by the warriors' honor, ask to join their Clan. ShadowClan's leader, Cedarstar, allows them to stay for one moon during which they were to prove their loyalty. He is apprenticed to Mousewing, but declines to add the customary '-paw' suffix to his name. However, a misunderstanding leads Boulder's former kittypet-rogue friends to attack ShadowClan's camp, believing he and Red, now Russetpaw, had been kidnapped. He becomes a warrior and is given Wetpaw as an apprentice, despite the kit not yet being six moons old.

Novellas

 * In Tigerclaw's Fury, Boulder remains in ShadowClan when Brokenstar and his followers are exiled. As ShadowClan struggles with the carrionplace illness, Boulder accepts the help of Tigerclaw and his rogues, but warns them of the sickness his Clan carries. After the death of Nightstar, Boulder is confident that Tigerclaw is meant to be their leader.

Field Guides

 * In Secrets of the Clans, Boulder guides the reader on a tour of ShadowClan's forest camp.

Mistakes

 * He has been mistakenly called a silver tabby multiple times and is depicted as a gray tabby in the field guides.
 * Although listed as a rogue, he is said to have stayed in ShadowClan during Tigerclaw's Fury.

Members
Mother:
 * Unnamed she-cat: