The Kentucky Derby is the oldest continuously run horse race in the United States. It has been run every year since May 17, 1875.
I am not aware of one in the US, but there are several in other countries.
There is no fixed number of entries in either US or Canada. Depends on the track, the conditions, and the horses that are available.
The Dubai Cup has a US$10 Million purse making it the richest race in the world. The race is held at Meydan Race Track in Dubai, UAE.
The oldest horse in the world that is on record is 51 years old.
Riverside Race Track in Kansas City
The Eohippus horse was the firsthorse to help us!
the best racehorse in the usa is the thoroughbred
The state of Kentucky, where the Kentucky Derby is held
Dubai hosts the Dubai world cup series of races, and the top race of the meet is the Dubai World Cup, it has a grand prize of ten million dollars (US dollars). The first place horse get six million dollars for winning.
There is not a Circus Maximus in the US. The Circus Maximus was the biggest race track in ancient Rome.
Horses are raced both clockwise and counterclockwise in Australia. The decision to run horses counterclockwise in the US dates to the American Revolution era. In 1780, the first circular US race track was established by William Whitley near his home in Lincoln County, Kentucky. A staunch supporter of the Revolution, Whitley insisted that horses race counterclockwise, as opposed to clockwise as was the custom at the time in England. Some but not all American tracks followed the change immediately. Belmont was run clockwise from its opening until 1921. Today about 30% to 40% of English horse racing is now counterclockwise like all horse racing in the US.
The Amazing Race first aired in the US on September 5, 2001 on CBS.