Idaho's Native Fish in Peril
Bull trout are a native fish, found in the cold, clear lakes, rivers, and streams of the Pacific Northwest and Northern Rockies. Because Idaho has some of the coldest, cleanest mountain waters, Idaho represents a stronghold for this species. Even so, bull trout have been eliminated from 60% of their historic range.
In 1999, bull trout were listed as threatened under the Endangered Species Act, primarily due to loss of habitat, non-native species, and climate change. In 2010, the U.S. Fish and Wildlife Service designated 9,000 miles of Idaho’s rivers and streams as bull trout “critical habitat.”