Upper Yakima Bull Trout Restoration and Monitoring Project
What We Know About Upper Yakima Bull Trout Populations: Isolated populations of bull trout living in the Upper Yakima Basin face significant challenges such as blocks to adult migration, degraded instream habitats, and invasive species. Sensitive to warming temperatures, they are also increasingly challenged by a changing climate. As a result, Yakima Basin bull trout populations currently consist of low numbers of adult spawners. Extreme seasonal dewatering presents an additional challenge, resulting in frequent stranding and desiccation of juveniles.