YOU SAID:
i love to hike mountains
INTO JAPANESE
山をハイキングするのが大好き
BACK INTO ENGLISH
I love hiking mountains
INTO JAPANESE
山のハイキングが大好き
BACK INTO ENGLISH
I love mountain hiking
INTO JAPANESE
山のハイキングが大好き
BACK INTO ENGLISH
I love mountain hiking
That didn't even make that much sense in English.