YOU SAID:

I walk my dog to the park and back

INTO JAPANESE

私は公園に戻って私の犬を歩いて

BACK INTO ENGLISH

I returned to the park and walked my dog

INTO JAPANESE

私は公園に戻って私の犬を歩いた

BACK INTO ENGLISH

I went back to the park and walked my dog

INTO JAPANESE

私は公園に戻り、私の犬を歩いた

BACK INTO ENGLISH

I went back to the park and walked my dog