Napa County, California, is renowned for its picturesque vineyards and wine production. Located in the northern part of the San Francisco Bay Area, it covers approximately 789 square miles and is home to the famous Napa Valley. The region's Mediterranean climate and fertile soil make it ideal for growing grapes, contributing to its status as a premier wine destination. The county's largest city is Napa, which serves as the county seat. In addition to wine, Napa County offers outdoor activities, including hiking and biking in its scenic parks. The area is also known for its charming towns, such as Yountville and St. Helena, which attract visitors year-round.