It seems the junior track is closed, but there is one. I had 4 under 12 children and they all did the big track with junior carts, I see no reason that you couldn't ride with them but I didn't race with them that day.
They don't have a junior track, both tracks are used for adult and kid races. The kid's karts are smaller, but if you can fit inside, you should be able to race with the junior karts.
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