 Several streams in the <unk> Creek Mountains are home to trout , including the rare <unk> <unk> trout subspecies . These include <unk> Creek , <unk> Creek , Little <unk> Creek , <unk> Creek , Fifteen Mile Creek , Indian Creek , Sage Canyon Creek , Line Canyon Creek , and some tributaries of <unk> Creek . <unk> <unk> trout live in small , isolated populations that are often confined to individual streams , many of them in the <unk> Creek Mountains . These populations have significant genetic differences due to their history of isolation . For most of the 20th century , the trout 's numbers declined considerably . It was listed under federal law as an endangered species in 1970 and was reclassified as threatened in 1975 . Reasons for the fish 's decline included habitat degradation from cattle grazing , drought , <unk> , competition with other fish , and <unk> with introduced rainbow trout , which decreased the number of genetically pure <unk> <unk> trout . However , reductions in cattle grazing in riparian zones since the 1980s allowed fish habitat and populations to start to recover . 
