"The Adventure of the Solitary Cyclist" is a Sherlock Holmes short story by Sir Arthur Conan Doyle, included in The Return of Sherlock Holmes collection. It was first published in Collier's in the US on December 26, 1903, and in The Strand Magazine in the UK in January 1904. The story follows Holmes as he investigates the mysterious circumstances surrounding Violet Smith, whose life and that of her mother have changed following her father's death and the arrival of two men claiming ties to her deceased uncle in South Africa.