Big Sioux – Located off Los Alamos Rd near Cypress Lane in Rancho Mirage, CA. Big Sioux is a luxury custom home community on prime real estate. Rarely do homes at Big Sioux come on the market, so act quickly. Close to dining, and shopping plus Mission Hills Country Club is across the street. Situated on fee simple land with recent HOA monthly $600. Homes are 4 – 6 bedrooms and 4,000 – 8,000 sq. ft. Call us today at 760-413-6595 for a tour of Big Sioux in Rancho Mirage, CA Homes for Sale.