The Kokiri

Once you get to Kokiri Forest, you will notice that there are many more enemies now. Ask around and you'll soon find out that Saria went to the Temple. Now head into the Lost Woods. Once you get to the shortcut to Zora's Domain, you'll meet Mido who will not let you by again. Play Saria's Song and continue to the Sacred Forest Meadow. Here you will notice that there is much stronger enemies than before (who ever thought that Deku Scrubs grew up so quickly?). You will now have to sneak up behind them with a charged sword or you'll get spiked. Before you get to the Temple, you'll have to get past a huge enemy with creates shockwaves on the ground. Dodge them, and run by his legs, then take him out from behind. Once you get to where Saria usually is, Sheik will appear  and teach you the Minute of Forest. Now use your Hookshot on the branch above the opening to enter the Forest Temple.

Continue to The Forest Temple