Zora's River

Before you head to the river, go back to the castle and blow up the boulder near the path to the castle to see a Great Fairy of Magic. She will grant you Din's Fire. Now make your way to Zora's River which is just upstream to Kakariko Village. To enter Zora's River, you will need to blow up some rocks by the entrance. Buy some magic beans from the kid, then use the chicken to continue upstream. The chicken will come in handy to optain secrets and allow you to use some shortcuts, otherwise you can only cross the river where is is thin. Continue on until you get to the waterfall. Play Zelda's Lullaby infront of it and then jump through.

Continue to Zora's Domain