That mountain is so dangerous, some people die climbing it.
That mountain is only for experienced climbers. There are deaths there every year.
この場合、次のような言い方ができますよ。
ーThat mountain is so dangerous, some people die climbing it.
「その山はすごく危険で、登って死人が出るほどです」
ーThat mountain is only for experienced climbers. There are deaths there every year.
「その山は経験を積んだ登山者向きです。毎年そこでは死人が出ます」
ご参考まで!