Is it correct to say: "he led me through a path in the forest"?
Here, path has been used as a synonym of 'road' or 'street' and is trying to convey the idea that you are traversing a path in the middle of a forest, hence walking 'through'.
Is it correct?
According to Google‘s English Dictionary (provided by OxfordLanguages) we have the following definition:
Through: moving in one side and out of the other side of (an opening, channel, or location).
With this definition in mind, it should be clear that we cannot walk through a path as need there to be a clear entrance and exit in order for this to make sense in line with the above definition.
Instead, your sentence could be corrected (as mentioned in the comments) one of the following:
In the second sentence, we keep the word "through" but this time we use it to describe your movement in and out of the forest. If you refer back to the definition, you will see that this now makes sense.
Is it correct to say, "he led me through a path in the forest"?
This is perfectly normal and a good use of English:
To the fluent reader, this suggests that the path is narrow (probably because of tall undergrowth on either side).
It also has the nuance of the narrator entering the path and emerging from it at the other end.
If the writer had used "along", the "flow" of the writing would have been lost when the writer had to explain that the path ended.
We have no difficulty at all with such a sentence as
"He led me through the trench to an area of open ground."
