After donating 1000 ruppees to Malo mart to repair the bridge talk to the Goron elder outside. He'll then ask you to deliver some hot spring water to the goron waiting next to the newly repaired bridge. To avoid the barrel of water getting hit walk round next to the cliffside on your right. You may need to take out one or two moblins this way so just pick them off with your bow and make sure you're quick.

After smashing the barrel over the goron's head he'll give you a piece of heart and he'll open up a hot spring water shop in castle town use this water to quench the goron at the south entrance and he'll unblock the boulders on that route.

Submitted by Tony Califano, Jacob Roberts