Placer County is located in the state of California, situated in the Sierra Nevada foothills. It is known for its diverse landscapes, which include mountains, forests, and rivers. The county is part of the Sacramento metropolitan area and has a mix of urban and rural communities, with Auburn serving as the county seat. Established in 1851, Placer County played a significant role during the California Gold Rush. Today, it offers various recreational activities, including hiking, skiing, and fishing, attracting both residents and visitors. The county is also home to several parks and natural reserves, promoting outdoor activities and conservation.