Klamath River bull trout were listed as threatened under the federal Endangered Species Act in 1998. In the final listing rule, seven subpopulations were identified within the Klamath River basin: Threemile and Sun Creeks (tributaries to Upper Klamath Lake), Long Creek (tributary to the Sycan River); and Deming, Leonard, Brownsworth and Boulder/Dixon Creeks (tributaries to the upper Sprague River). All of these populations are considered “precariously low.”  However, very little current information is available for Leonard, Deming or Boulder/Dixon Creeks. 

In 2005, the Native Fish Investigations Project and Klamath Watershed District initiated quantitative electrofishing surveys in Leonard, Deming, Sheepy, and Boulder/Dixon Creeks.  Our goal was to obtain current information about the distribution and abundance of redband and bull trout within the Sprague River subbasin.