Knott's Scary Farm, Halloween event at a theme park in Buena Park, California, United States

Knott's Scary Farm is a seasonal Halloween event at Knott's Berry Farm in Buena Park, California. The 160-acre park is transformed with mazes, scare zones, and roaming monsters, and as of 2023 it has 10 mazes, 5 scare zones, and 4 live shows.

Two staff members from the marketing department, George Condos and Martha Boyd, launched the event in 1973 as a three-night experiment. Over the following decades the program grew into a multiweek event with changing themes and additional areas.

The event began as a three-night Halloween Haunt in 1973, and its mascot, the Green Witch of Calico, was first played by Diana Kirchen-Kelly as Spooky Sarah. Charlene Parker then held the role from 1983 to 2017, known for gliding rather than walking and startling guests so often that staff called her the top cause of separated parties.

Access is available on select evenings from late September through early November. Most mazes are indoors and sit inside enclosed buildings, while open zones are spread among the regular rides.

Charlene Parker played the Green Witch of Calico from 1983 to 2017, gliding rather than walking so she could catch guests by surprise. Before mobile phones, Knott's Guest Relations called her the number one cause of separated parties, and sweepers waited near her knowing groups would soon throw food in the air.