My kids would adopt you for an Uncle in a minute. . . is it easy to get there? The gang would love it & so would I
really easy to get to. we parked a little further away to mae a hike out of it, but you could park almost right on top of the tunnel, at byram park. i'll link it below. just walk out the north side of the park, around the fence, and you'll be on top of it. you wont be able to get down on the left side(west end), so once you've explored the top, just head back to the west side and follow the 4-wheeler trail that brings you around the north side and down to the east entrance. there's alot to see on the top though. they had originally intended to make it a cut, but were running into soil stability issues i think, so scrapped that in favor of a tunnel. some mining occurred in the area too, and you can find molten iron slag and several pits on top and along the trail. bring flashlights.
byram park on google maps
we had parked closer to amity rd on roseville, in a little turnoff right by the old railbed.