Butterfly Valley Botanical Area, in the northern Sierra Nevada, was designated a protected botanical area in 1976 due to its abundant, diverse plant life. It is located just north of Quincy, in Plumas County of northeastern California, United States. The unique plant community habitats of the nature reserve, thriving at elevations of 3,590–3,800 feet (1,090–1,160 m), are protected and managed by the Mt. Hough Ranger District of the Plumas National Forest.