YOU SAID:

i like to run a lot of miles

INTO JAPANESE

私は何マイルも走るのが好き

BACK INTO ENGLISH

I like to run many miles

INTO JAPANESE

何マイルも走るのが好き

BACK INTO ENGLISH

I like to run miles

INTO JAPANESE

マイルを走るのが好き

BACK INTO ENGLISH

I like to run miles