Train Mountain Triennial 2015 Welcome to the largest hobby railroad in the world: Train Mountain. The tracks are only 7 ½ inches apart yet they take you for a 37-mile journey through the pristine countryside in the forested slopes of the Cascade Mountains. Live steam enthusiasts come from all corners of the globe to test their railroading skills on the stiff mountain grades of these rails, and enjoy this fun hobby. 2015 was the biggest international meet ever and this program covers all the excitement. Over 100 live steam locomotives plied the rails as well as modern diesels and classic box cab electrics. Enjoy! 1 hr. 39 min.