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 and 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.”