Also known as Jack London Home and Ranch, is a California State Historic Park near Glen Ellen, situated on the eastern slope of Sonoma Mountain. It includes the ruins of a house burned a few months before Jack London and family were to move in, a cottage in which they had lived, another house built later, and the graves of Jack London and his wife. The property is both a California Historical Landmark and a National Historic Landmark.
The Jack London home, called the Wolf House, is a sizable stone structure, which was destroyed by fire and whose ruins are visible within the state park property. The sloping terrain of the park has a considerable occurrence of Goulding clay loam soils, particularly in the lower reaches.