As promised here are several pictures of trains we saw on the trip.
The first one is of a freight train rumbling across the river at Harper's Ferry. This picture was taken from Maryland Heights.
This commuter train was coming through Harper's Ferry. In the picture above it was on the track on the left.
Another commuter train, this time at Monocacy.
Finally another frieght train crossing the Potomac River at Shepherdstown.
We saw our fifth train as it passed the train depot at Sharpsburg. We pulled up as it was coming, Mike jumped out and took some video but I was there thinking, "Five trains, geez, how many pictures of trains do I really need?" So I sat in the car while Mike got his minute or two of footage.