BigMac your are right, that's Black Jack Ridge in the background with Mt. Benson. You can still find rusty junk and track laying around out there if you look hard enough. My hiking experience this year through the clear cut has given me an opportunity to see the true layout of the land and ridges without the trees obstructing my view, so I understand the location of the photos a bit better.
AllieG good luck with those negatives. Hopefully your grandfather took some pictures of the electric train!