The Del Mar Thoroughbred Club racetrack is within the Del Mar Fairgrounds in southern California, around 20 miles north of San Diego.
The seaside city of Del Mar was a summer playground for Hollywood stars in the 1930s and 40s.
Its horse racing track was built by a partnership including the singer Bing Crosby and the actors Gary Cooper, Pat O'Brien and Oliver Hardy.
Crosby personally welcomed race-goers at the gates when the track opened in 1937.
The following year a big money race between Seabiscuit and Ligarotti - the first to be broadcast on national radio in the US - put the circuit on the map.
Today it has a capacity of 44,000 spectators and also hosts concerts and other events.
The one-mile oval circuit has courses on both sand and turf and is considered one of America's leading horse racing venues.
What happened in the Del Mar shooting?
On September 2, shots were fired as horses crossed the finish line during the final race of a live televised competition.
The suspect was reportedly taken to hospital where his condition was unknown.
There were no other reported injuries.
The Thoroughbred Club said the concert went ahead as planned.
Police treat shooting suspect at Del Mar racetrack after at firing at the man
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