Diamond Valley (Washington County, Utah)

Diamond Valley is a valley in northern Washington County, Utah, United States, that is located about 3 mi north of the northern limits of St. George on Utah State Route 18, just past the entrance to Snow Canyon State Park at an elevation of approximately 4500 ft, 1800 ft higher than the neighboring metropolis of St George. The unincorporated community of Diamond Valley is located within the valley, as is the Santa Clara Volcano.