In 1874 Weston walked his first 6 - day race .
In 1874 Weston was challenged by Daniel O'Leary , who completed 500 miles ( 800 km ) in 153 hours .
In 1874 Weston walked his first 6 - day race and was challenged by Daniel O'Leary , who completed 500 miles ( 800 km ) in 153 hours .