The Ghost Dance site, located at the northern end of the Sacramento Valley, was inhabited from 2000 B.C. to the 1880s. The site is large and complex. Seventeen round housepit depressions measuring from 10 to 25 feet in diameter are adjacent to a large, deep, rectangular earthen structure. Large structures such as this one are nearly unheard of in California archaeology. The midden deposit is at least three feet deep and extends more than 300 feet from the center.