Fredonyer Peak is a mountain on the Modoc-Lassen Plateau in central Lassen County, California, about 16.2 kilometers east by north of Spaulding. At 2,452 meters, it is the highest point on the plateau. An old fire lookout tower and a radio mast stand on its summit, which can be reached by dirt road. Its height and prominence have made it both the plateau’s natural high point and a practical vantage over the surrounding country.