The White Pass Yukon railway was born to serve the 1897 gold rush between Skagway, Alaska and White Horse in the Canadian Yukon. It is a Class II, narrow gauge railway which allowed for tighter radius turns to be used on curves. This eliminated having to blast through much of the route, though 450 tons of explosives were used nonetheless to reach White Pass summit.
Enroute, the train passes the grave of Soapy Smith, the corrupt Skagway crime boss, who was shot on a Juneau wharf.
The train presently serves tourists between Skagway and White Pass. This is one of a number of trestle bridges, which span streams and valleys enroute.