california state fairgrounds race track has been the name of two dirt oval racing tracks located in sacramento, california. the track was built in 1906 for horse racing on the site of the california exposition. it was active for auto racing in 1907, 1912, and from 1946 until 1970. the exposition moved to a new site north of downtown sacramento in 1968, and the old fairgrounds were closed and sold for development in 1970. the final day of the track was marred by tragedy when three drivers were killed in the 100-lap super-modified caged sprint car competition .