Marjorie Cottle (5 September 1900 – 17 July 1987) was an English works supported motorcycle trials rider. She was one of Britain's best-known motorcyclists in the 1920s and 1930s. She competed regularly in reliability trials and was considered to be one of the best riders in the country, male or female. Her greatest success was the International Six Days Trial of 1927, in which the British Ladies' Team won the International Silver Vase. That year the trial was held in the Lake District, and attracted a large number of competitors. She was described as the "most famous girl rider in the world".[1]