[MrPoPo]

I'm having a problem that i can't seem to get around.

After forest temple part 1
I now have to enter the twilight realm, but in that massive hyrule field there are only two other 'ways out' (excluding the route back to the oil salesman) the one has a locked gate with two guards and skeletal wolves that come out from the ground, and the other (BTW When I approached it the mailman came) has a little alleyway and then a pile of rocks to form a wall blocking my way.

I looked at the walkthrough and it says nothing about this wall or the gate. It only mentions the mailman and then says continue to enter the twilight.

Am i missing something important?