Willow Valley, CaliforniaWillow Valley is an unincorporated community in Nevada County, California. Willow Valley is located south-southwest of North Bloomfield. It lies at an elevation of 2746 feet.EducationThe Willow Valley school district was annexed into nearby Nevada City, California in the early 1930s.EconomyWillow Valley was an area of gold and quartz production. Willow Valley Mining bought several gold mines in the vicinity in 1950.