Distribution of R. muscosa and introduced trout in the Sixty Lake Basin, Kings Canyon National Park, CA. This 32-km2 basin contains 81 water bodies, of which only the largest are shown. Lakes labeled 1-5 are the trout removal lakes; fishless control lakes (*) and fish control lakes (**) are also shown. (Inset) The entire range of R. muscosa, including the Transverse Ranges in Southern California, and the Sierra Nevada, where this study took place.