Boulderfur

Boulderpaw is a large, pale gray tom.

The Fourth Apprentice
His mentor is shown to be Breezepelt.

The Forgotten Warrior

 * Boulderpaw is seen with Breezepelt, Heathertail, and Furzepaw when they meet Birchfall and Ivypool at the stream. They demand to know why they are in WindClan's territory in the first place, despite the stream not being owned by either Clan. When Heathertail asks Furzepaw why she is hanging back from the dispute, Boulderpaw says that he'll fight the ThunderClan cats, but Breezepelt tells him that it isn't a battle worth fighting for.