An Eastbound Mason City to Marquette freight train has 8 miles to Marquette. The train snakes around the Spook Cave area as the railroad drops down into the Mississippi River Valley. alAn unusually pair lead the train today. The SRYs were mainly kept on the Jackson Sub in the later parts of the IMRL due to their large fuel tanks. They could go to Wells for the week and make it without fuel. Scanned Slide.