Hoosimbim Mountain is a summit in Trinity County in northern California that rises to 5,364 feet. Among California peaks, it ranks as the state's 2,323rd highest summit. Its distinctive name comes from a Wintu-language phrase meaning “buzzard’s water,” preserving an Indigenous place-name in the modern landscape. The documented significance of the mountain rests chiefly in its elevation, its location in Trinity County, and the origin of its name.