A then 1 1/2-mile horse race was inaugurated in this state in 1875; Aristides won by 2 lengths
.... the Kentucky 
Derby was originally contested at 1 1/2 miles, and was only shortened... [DOC] [TLE] OOLAC - #Graded_stakes_races_in_the_United_States [PAR] The Kentucky Derby was first run at 1 12 miles (2.4 kilometres), the same ...