Vacaville is a city located in Solano County, California. It is situated between San Francisco and Sacramento, making it a convenient spot for commuters. The city is known for its pleasant climate, with warm summers and mild winters, and it has a population of around 100,000 residents. The area features several parks and recreational facilities, including Vacaville Premium Outlets for shopping and Lake Berryessa for outdoor activities. Vacaville also has a rich history, with roots dating back to the 19th century, and it is home to the California State Prison, Vacaville.