YOU SAID:

I would like to ride a big horse

INTO JAPANESE

大きな馬に乗りたい

BACK INTO ENGLISH

I want to ride a big horse

INTO JAPANESE

乗馬がしたい。

BACK INTO ENGLISH

I want to go horseback riding.

INTO JAPANESE

乗馬がしたい。

BACK INTO ENGLISH

I want to go horseback riding.