As soon as you're old/big enough to be able to ride, you can start to do DH.
If you're real young you might not be able to handle a full-sized, full suspension bike, so you may have to use a BMX or a Dirt bike instead
Trails come in various degrees of difficulty, so start easy and work your way up. If you want to ride at a place where people use ski lifts to get to the top, check with the lift operators. They may have age/size restrictions for who's allowed in the chairs.
NO WAY That is wrong!
you can ride a dirt bike at any age
A 13 YEAR OLD CAN RIDE A MINI BIKE AS LONG AS IT IS NOT ON A PUBLIC STREET.
depends how old you are
How old do you have to be to own a sportbike?
Yes. If an 8-year-old wants to learn to ride a bike, another person can teach them to ride it. Usually, that involves helping to balance the bike until they get the hang of riding it.
Miley Cyrus probably learned to ride a bike when she was around 6 years old. She has never mentioned in interviews that age she learned to ride the bike.
16
11 or up.
As long as you have a valid motorcycle license you can ride any size bike at any age.
I'm not exactly sure how big a super pocket bike is, but if the bike is too small for you to ride safely, get a bigger bike.
85 years old