What Challenges Are There?
In addition to the physical difficulties and mental isolation, surviving in nature for months itself can be a tremendous challenge.
Hikers cook their own meals, and sometimes they have to endure days without eating.
Securing water is another crucial requirement because not all the water sources are safe to drink.
Hikers are advised to carry the latest PCT Water Report, a list of all water sources.
When it comes to sleeping, most hikers sleep in tents, and in some areas, they can use shelters to stay safe from the harsh weather.
If you are lucky, you may find “trail angels,” who provide transportation to close towns, meals, or other forms of assistance.

In addition to the physical difficulties and mental isolation,
surviving in nature for months itself can be a tremendous challenge.
surviving in nature for months는 문장의 주어로 쓰인 동명사구이다.
itself는 앞의 동명사구 surviving in nature for months를 강조한다.
Securing water is another crucial requirement because not all the water sources are safe to drink.
Securing water는 문장의 주어로 쓰인 동명사구이다.
부분 부정인 not all이 사용되어 ‘모든 것이 ~은 아니다’라는 의미를 나타낸다.
If you are lucky, you may find “trail angels,” who provide transportation to close towns,
meals, or other forms of assistance.
who … assistance는 trail angels의 의미를 부가적으로 설명하는 관계절이다.
transportation … assistance는 provide의 목적어로 쓰인 명사구이다.