yes
The Kentucky Derby
The first Kentucky Derby race was run in 1875.
Yes, The Kentucky derby is open to members of both sexes.
The "sister race" for the Kentucky Derby is the Kentucky Oaks. The Oaks is a mile-and-an-eighth race is for 3-year-old fillies. It is held the Friday before the Derby.
The Kentucky Derby is a race for Thoroughbreds.
Only 3 year old Thoroughbreds are allowed to run in the Kentucky Derby. No other age is allowed.
By 'Kentucky Horse Race' I'll assume you mean Kentucky Derby as there are hundreds of races in Kentucky. The Derby is a mile and one fourth in length.
Yes the Kentucky Derby is the largest horse race in the world and it is also the oldest.
Thoroughbred
Yes.
The Kentucky Derby is held annually in Louisville, Kentucky, which is in the Eastern Time Zone.
The 2014 Kentucky Derby was the 140th running of the race.