The path to the station is narrow and crowded, so it's hard to walk through
The path to the station
駅までの道は
人通りが狭くて多くて
直訳的にit is narrow and there are many peopleになり、通じると思いますが、
it is narrow and crowded （狭くて混んでいて）の方が自然な言い方ですね。
It is hard to walk through
歩きづらい
It is hard to walkを言うと「足が弱くなったりして歩きづらい」と言う感じになってしまいますね。
ご参考になれば幸いです。
The road that goes to the train station isn't a very big street and there are lots of pedestrians walking there, so it's not a good street to walk on.
この場合、次のような言い方ができますよ。
ーThe road that goes to the train station isn't a very big street and there are lots of pedestrians walking there, so it's not a good street to walk on.
「駅までの道は狭くて歩行者が多いから、歩きづらい」
the road that goes to the train station で「駅までの道」
It's not a good street to walk on.「歩きづらい」
ご参考まで！
アメリカ合衆国 
カナダ 
