a mile "or" so in ?

lao2lao2

I have a question about the \"in\" uses in the end of the following
sentence:

\"There's an old abandoned logging road that McDermott has trekked up and
down hundreds of times because some of the best wood for his fiddles is
found in a stand of trees a mile or so _in_.\"

Is it correct?

Personally, It will be better to change this 'in' to 'away'.