In the vicinity of McGee Mountain, steam and warm water are reported from along a mountain-front fault that may extend northeast to Bog Hot Springs (Hose and Taylor, 1974). The area is also described at the Painted Hills thermal area (Hulen, 1979). A core hole, probably located in the vicinity of the Painted Hills mercury mine in SW¼ Sec. 23, T45N, R27E was reported to have 55°C water at 61 m (Wendell, 1970, p. 95, 98, 109). Trexler, Koenig, Flynn, and others (1981; Table E2) reported that the springs in the McGee Mountain area are cold (10°C) and the core hole may no longer exist. However, a thermal-gradient groundwater anomaly about 5 km in diameter is centered on the mine and the adjacent fault (Edquist, 1981). Thermal-gradient data for the area are reported by Earth Power Production Co. (1977, 1979a, 1980a), and geophysical investigations in Edquist (1981). The maximum temperature in gradient wells was 97.7ºC at 91 m (GeothermEx, 2004).