It has quite an elevation considering how close it is to the ocean.
It's pretty high up in the mountains even though it's quite near the sea.
ーIt has quite an elevation considering how close it is to the ocean.
「海から近い割にはかなり高さがありますね」
to have quite an elevation で「かなりの高さがある」
considering ...で「…の割には」
ーIt's pretty high up in the mountains even though it's quite near the sea.
「かなり海に近いのに、ずいぶん標高が高いですね」
high up in the mountains は直訳すると「山の中の高いところで」となり「標高が高いところで」という意味になります。
ご参考まで！
カナダ 
