Lost Woods
From the entrance to the woods, go right into the next area, then go left.
Turn right again, and then go left through a couple of areas. Then, turn left
and finally turn right. Go through the maze at the Sacred Forest Meadow, and
talk to Saria at the end. She'll teach you Saria's Song, which lets you speak
with her anytime. After that, get all the way back to Kakariko Village by the
gate like before. Now that the gate is opened, it's time to go up Death
Mountain!