I think I took a picture of this engine before but I'm not sure.
As you know, I am also a railfan. I wasn't going out of my way to chase trains though. This particular engine is right off US-2, so I had to stop and get a picture of it.
The engine in question is a 4-6-2 Pacific engine belonging to the Soo Line. It was built in 1904 by the Alco-Schecnectady Locomtive Works.