Have the Goron mask assigned to a C-button and call Epona. Ride to Southern Swamp or Milk Road and find the Owl Statue. Save while still on Epona. Start the game again and you should find yourself still on Epona. Press the C-Button you equipped the Goron Mask to. You should change into Goron Link and not able to fit on your horse. Press the analog stick forward to find that you can use Epona without having Link on her. If you press the A-button to "curl," it will say that you can't fit on Epona, but actually you'll be riding in mid-air above her. Exit Milk Road and you'll be riding her as Goron Link! You can also do this in Clock Town but you will just be Epona, you can't ride her as a goron. You can do this on anyday. CAUTION: If you try to shoot the bow as Goron Link, the game will freeze.