PROTECTION STATUS: Not listed
PETITIONED: 2012
RANGE: Willamette River system, Oregon, south to the Upper San Gabriel River in Los Angeles County, California, and the western slopes of the Sierra Nevada
THREATS: Dams, water development, water diversions, timber harvest, mining, livestock grazing, roads and urbanization, marijuana cultivation, off-road vehicles, climate change, pollution, invasive species, disease
POPULATION TREND: This frog's population has declined by more than 50 percent rangewide; it is extirpated from Santa Barbara County south to San Diego County.