Congoron Caves (now goron grotto)

[JimRCGMO]

On the early part of this game, I have not found if there is another red key so that I can enter the 'top right' red door (instead of taking the slide pole down to the other parts of the grotto). It seems to be an either/or choice - I can get the green key by using my red key to get across the gap to the green door's key(where the blue key is), or I can use the red key to reach the upper right part of the early part of the grotto.

Is there another key in the first part of the game that I have missed? (Thanks for any tips)

Jim