Peter Dreesen’s San Francisco Velodrome FB album, https://www.facebook.com/media/set/?set=a.2323008761087400&type=3

William Corbett’s FB post shows a detailed article describing the construction of the Central Park Velodrome in SF, https://www.facebook.com/groups/YesterdaysVelodromes/posts/1271449503408189/

This article mentions more velodromes in SF, https://www.foundsf.org/index.php?title=19th_Century_Velodromes_in_SF: 

• Baker & Fell intersection, opened in 1896, closed in 1898/99.
• Mechanics Pavilion
• 7th & Stevenson
• Valencia Gardens Housing Project

An article about the Baker & Fell velodrome, https://cdnc.ucr.edu/?a=d&d=SFC18960807.2.169

A picture of the Central Park velodrome? https://www.foundsf.org/index.php?title=19th_Century_Bicycling:_Rubber_was_the_Dark_Secret

Foundsf’s Bicycling page, https://www.foundsf.org/index.php?title=Category:Bicycling

1919 SF Chronicle article about SF Velodrome, https://www.newspapers.com/clip/1328636/san-francisco-chronicle/