Simplify the following text for a Grade 11 native English-speaking person.
Original: The first national race of Belgium was held in 1925 at the Spa region 's race course , an area of the country that had been associated with motor sport since the very early years of racing before the turn of the century .
Simplified: The first national race of Belgium was held in 1925 at the Spa region 's race course , an area of the country that had been associated with motor sport since the very early years of racing .