YourToyTrains- Model Trains- We want to share a memory. Just east of Bozeman, Montana, Interstate 90 traverses Bozeman Pass (Elevation 5,702 feet) in the Montana Rockies. The Northern Pacific Railway built its transcontinental rail line through the pass in 1884- the present tunnel was opened in 1945. A segment of old US Highway 10, once the main transcontinental highway, is open for local traffic. Great views of the railroad tunnel and the surrounding mountain scenery can be easily photographed from this outstanding vantage point. Happy travels!