The following mammals are confirmed to be resident or to have seasonal or occasional occurrence at Pepperwood. Taxonomy follows that of Wilson and Reeder, per Mammal Species of the World.

Sorex vagrans sonomae (=Sorex sonomae)
Reithrodontomys megafotis longicaudis (=Reithrodontomys megalotis longicaudis)
Peromyscus truei gilbert! (=Peromyscus truei gilberti)
Urocyon cinereoarg enteus townsendii (=Urocyon cinereoarg enteus townsendi)
Mustela vison aestuarina (=Neovison vison aestuarina)
Odocoileus hem/onus columbianus (=Odocoileus hemionus columbianus)