Just inside this side of the grove of trees on the right, there is a pipeline where the railroad used to be. The treaty line intersects with the county road a little further away, but not as far as the top of the hill in the distance. (Unfortunately I did not go that far to take a look at the exact spot.) The county highway is the boundary between Bureau and LaSalle counties.
treaty linesIllinoisLaSalle CoBureau CoClarion TwpTroy Grove Twp