The Idaho Department of Fish and Game, in partnership with the U.S. Forest Service, will begin Phase 1 of a long-term restoration effort in Binarch Creek this summer, aimed at removing non-native brook trout to support the recovery of native westslope cutthroat trout.
The removal project, located in North Idaho’s Kootenai National Forest, will use targeted methods to eliminate brook trout, which were introduced to the creek in the 1940s. Since then, the non-native species has outcompeted and displaced most of the native trout in the stream.
“While this effort will temporarily reduce fish numbers in Binarch Creek, it’s designed to produce long-term benefits for native fish populations,” said Fish and Game officials. “Our goal is to restore a self-sustaining population of westslope cutthroat trout, which are native to this region and an important part of Idaho’s aquatic biodiversity.”
Brook trout, which reproduce rapidly and thrive in small stream environments, often overwhelm native species like cutthroat trout, pushing them out of their historical habitat through competition for food and spawning space.
The project is the first phase in a multi-year, collaborative restoration plan. Future phases will include stocking native trout, habitat improvements, barrier removals, and other actions to enhance stream health and fish passage.
“Restoring native fish requires more than just removing invasive species,” said a U.S. Forest Service representative. “It’s about rebuilding the entire ecosystem—from in-stream habitat to fish access routes—so that native trout have the conditions they need to thrive.”
Officials emphasized that community engagement and transparency will be part of each stage of the project. Local anglers and conservation groups have voiced support, recognizing the ecological and recreational value of native fish restoration.
Field crews are expected to begin brook trout removal later this summer. Updates on progress and future phases will be posted on the Idaho Fish and Game and U.S. Forest Service websites.
By: DNU staff