Turn left at the line, you will have some nice valleys to shoot across and a couple of lakes for lunch/picnics.
After you cross the river, do not turn right, that dead ends a few miles further in. It used to go to the Salvation Army camp but it's now private.
Once you are on the hydro line, you can follow it back to the river, then jump to the rail bed and go west to Whitney, or east to Madawaska. Ice cream and beer at both....