Sanjo Racecourse, Former horse racing venue in Sanjo, Japan

Sanjo Racecourse was a horse racing track in Sanjo, Niigata Prefecture, that operated as a local public racing venue. The site featured a one-kilometer dirt oval with a 195-meter straight and hosted races over distances from 800 to 2,200 meters.

Racing began here in 1928 under the Niigata Prefectural Livestock Association and continued with interruptions during and after World War II. The venue closed permanently in 2002 after the prefectural racing association accumulated large debts, and the site was later redeveloped for public use.

The site now serves as a local gathering spot, with the Mizu-Beling Sanjo project turning the old track into a riverside park for events and relaxation. Nearby, the Sanjo Riding Club keeps a connection to horses alive, offering lessons and rides in the area.

The former racecourse grounds are now an open area along the river, easily reached by car from Tsubame-Sanjo Station in about seven minutes. Visitors can walk through the site and see the disaster prevention station, but there are no racing facilities or grandstands left.

The track's 800-meter races were the debut stage for Great Roman, a star horse of Niigata racing. In 2009, the former grounds hosted equestrian events for the Toki Meki Niigata National Sports Festival, showing how the space was reused.