Questions about example sentences with, and the definition and usage of "Trekking"

Q: Trekking into the wilderness of Japan: I would like you to change this to more natural English please.
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The trails on this mountain are simply maintained and sometimes covered with bamboo grass or snow.

Some parts of the trails in this forest assimilate into the nature and might be indistinguishable for the people who don’t have enough route-finding skills for Japanese mountain trails.

If you are a foreigner and are not used to trekking on that type of route in Japan, you should go there with an experienced person.
soa natural?