How do you enter the gerudo fortress on the Legend of Zelda ocarina of time

you can only enter the gerudo fortress when you are adult link.
to enter you need epona (beat ingo in a race to get her).
when you have epona, use some of your carrots to jump over the broken bridge.
once you've done that keep ridin forward to get to the actual fortress.

hope this helps - if it doesnt, my apologies. :)