The card for the day features seven jumps races and children's events, including a Mad Hatter's tea party and Easter egg hunt.
Admission is free for all accompanied under-18s.
The first race is at 1.50pm, with the last one at 5.20pm.
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Pictures from the commemoration marking the centenary of the Quintinshill rail disaster, which killed more than 200 people, is underway.
The 100th anniversary of Britain's worst rail disaster will be commemorated at a special service today.