Dirt bike trails near brampton?

I wanted to buy a Motorcycle but i think it would be better ( for my parents sake) to get a dirt bike first. I have never driven a dirt bike or a motorcycle but i have a strong desire to. I live in Brampton, On...10 mins drive from Mayfield road and i wanted to know if there are any dirt bike trails in that area ( any where in Brampton...as far as Caledon). Next summer, i want to hit the trails as much as possible.
Thanks