Continuing...
First, a map to locate these next 3 shots.
Once the train got by the Big Horn wye you need to get around to the other side of the mountain to keep following it. The mountain is a nice smooth cone in shape, but the North slope is a thick mass of old pines with many downed trees. It's not very far- but very slow going. As a result I wasn't able to get the first shot I wanted of the train leaving the Big Horn Yard Limits- so I simply waited for the scheduled passenger train following about an hour later.