Famous because of the involvement of Robert Redford the Sundance Film Festival happens every January in what location?

The Sundance Film Festival is an American film festival that takes place annually in Utah. It is the largest independent cinema festival in the United States. Held in January in Park City, Salt Lake City, and Ogden, as well as at the Sundance Resort, the festival is a showcase for new work from American and international independent filmmakers. The festival comprises competitive sections for American and international dramatic and Documentary Films, both feature-length films and short films, and a group of out-of-competition sections, including NEXT, New Frontier, Spotlight, and Park City At Midnight.