I was leaving the national park in Montana and I passed this scene and pulled over. Having no clue if the train actually ran through these tracks anymore something told me to sit and wait. I waited for what felt like thirty minutes and there was no sign of a train so I started to walk back to the van. As soon as I got close to the van I heard the horn echo through the hills and ran back. The train made the image complete. It felt like it was manifested from thin air which made this image all the more special to me.