Dorothea Mitchell (1877–1976), also known as Lady Lumberjack, was a pioneer filmmaker in Canada. Mitchell co-founded the first amateur film group in Canada, the Port Arthur Amateur Cinema Society, in 1929, and made three feature-length films: A Race For Ties (1929), Sleep Inn Beauty (1929), and The Fatal Flower. The society's first film, A Race For Ties, has the distinction of being the first amateur feature length film in Canada.