Spring Mountain Ranch State Park, State park in Blue Diamond, United States

Spring Mountain Ranch State Park preserves the historic Sandstone Ranch in Cottonwood Valley, five miles northwest of Blue Diamond. The site holds a main ranch house, cabin and bunkhouse, blacksmith's shop, barn and corral, a two-hole outhouse, a chinchilla shed and the Wilson family cemetery. A flat lawn of short green grass runs toward a row of large trees, with a reddish-brown mountain rising beyond.

A campsite was established along the wash in the mid-1830s, serving travelers on the alternate Spanish Trail route through Cottonwood Valley. In 1876 Sergeant James B. Wilson and George Anderson formed Sand Stone Ranch. The ranch was listed on the National Register of Historic Places on April 2, 1976.

The ranch site was a stop on the alternate Spanish Trail route through Cottonwood Valley, used by pack and wagon trains until the railroad replaced them in 1905. Outlaws involved in horse stealing and raids on passing caravans also used this remote trail. The site became known as the "Old Williams Ranch" after mountain man Bill Williams, who rested his horses here in 1840.

The park is easy to navigate with marked pathways connecting the main house and outbuildings throughout the grounds. Visitors should prepare for desert conditions and bring plenty of water to stay comfortable during their visit.

The ranch site was a stop on the alternate Spanish Trail route through Cottonwood Valley, used by pack and wagon trains until the railroad replaced them in 1905. Outlaws involved in slave trading and horse stealing also used this remote trail. In 1840 mountain man Bill Williams rested his horses here, and the site became known as the Old Williams Ranch.