A catwalk is a narrow, usually elevated platform used by models to demonstrate clothing and accessories during a fashion show. It can be thought of as a stage for a fashion exposition. A catwalk is also known as a runway.
There was a documentary called "Catwalk". Catwalk, a documentary covering life on the fashion runways, was filmed in 1993 by director Robert Leacock and premiered in 1996. The film followed models Christy Turlington, Naomi Campbell, Yasmin Le Bon, Kate Moss, and Carla Bruni as they jetted around London, Milan, Paris, and New York during Spring Fashion Week, including behind-the-scenes footage. The film was shot in black and white and color, and featured many top designers at work, like a young John Galliano, Karl Lagerfeld, and Gianni Versace four years before his death.