California Impressionism is an art movement that emerged in the early 20th century, primarily in California. It is characterized by vibrant colors, loose brushwork, and a focus on capturing the effects of light and atmosphere. Artists often painted en plein air, or outdoors, to depict the natural beauty of California's landscapes, beaches, and gardens. Key figures in this movement include Guy Rose, William Wendt, and Edgar Payne. They were influenced by European Impressionism but adapted their techniques to reflect the unique light and scenery of the West Coast. This style contributed to the development of American art and remains influential today.