A small, mysterious, and isolated mountain range juts up in the center of the flat farmlands of California's sprawling Sacramento Valley. Fifty-thousand travelers pass through the valley every day along Interstate 5 and Highway 99 or overhead by air, noticing the unusual formation and wondering about it. It is the Sutter Buttes. To nearby native peoples it was, and still is, revered as Spirit Mountain. It provoked the curiosity of the first explorers...