In general Park City has two annual special events. They are Art Festival held in the summer and Sundance Film Festival held in winter which impact on parking and vehicular access in a major way.
During this event, there is no access to parking in the Main Street area. Follow the portable electronic message signs on the way into town for parking information. Once you park in the location directed, hop aboard one of the City buses that will whisk you to Main Street.
Sundance Film Festival
Parking is available but tight in the Main Street area. If you can make it to town without a car, you can rely on Park City's exceptional bus service. If you must drive, follow all posted regulations. More information about parking during Sundance can be found here: Sundance Film Festival Parking Regulations and Hints