Despite the "Hughes Photo LA" mark on the picture, some different opinions on location and date.
Indianapolis Speedway, Indiana in 1917 according to this one.
ebay.com
Getty Images say it's Daytona Beach, Florida in 1922.
gettyimages.com
As for Los Angeles, the Golden Submarine trialed and raced at Ascot Park on Slauson Avenue in 1917 and 1918.
Now for what it's worth - some fence forensics.
Here's a blown-up detail from a 1916 picture of Ascot Park. It shows distinctive chainlink fencing.
loc.gov
And the fencing in
e_r's Golden Submarine picture.
Maybe entirely coincidental - the "Jan. 13" in the picture.
The Golden Submarine did race at Ascot Park on Jan. 13 1918.
forums.autosport.com
The Golden Submarine was a popular exhibit at race meets for some years after it's final race in 1919.