1400 Guineas Stakes the Beacon course at Newmarket and would be open to four-year-old colts and fillies. They paid a 200 guineas subscription each to enter their horse. Colts would carry 8 st 7 lb and fillies 8 st 4 lb. The race was initially to be run for five consecutive years from 1758, but was subsequently renewed in 1763. The weights were changed in 1768, with colts carrying 8 st 10 lb and fillies 8 st 7 lb. The race was discontinued after 1782 and a similar race was started for three-year-olds in 1784. 1400 Guineas Stakes The 1400 Guineas Stakes was
Union Race Course Trotting Park' but the increasing value of the land for housing proved too much. The final horse race was run at Union Race Course on July 18, 1863. The positioning of this race course, as well as the earlier built race course called Pioneer Race Course appear to have affected the placement of the San Francisco-San Jose Railway. Union Race Course Union Race Course was a horse racing track opened in the 1850s in San Francisco, California located in the Mission District. There were two horse race courses in the Mission District at this time, the other being Pioneer Race