Native American used these springs for thousands of years before Frank Marble "discovered" them in 1848. William Day established the resort here in 1854. Ukiah Vichy represents one of the oldest continuously operating mineral springs resorts in California. Its waters remain among the most important of the thermal, alkaline-carbonated waters so highly valued by both European and American believers in hydropathy. It is the only mineral springs in California that resembles the famed Grand Grille Springs of Vichy, France.

California Registered Historical Landmark No. 980

Plaque placed by the State Department of Parks and Recreation in cooperation with Vichy Springs Resort. June 6, 1991.