White Pass & Yukon Railway No. 190 is an S118 class 2-8-2 Mikado type steam locomotive built in 1943 by the Baldwin locomotive works for the United States Army Transportation Corps. The locomotive was design to haul passenger and freight trains on the US Army Transportation Corps White Pass & Yukon Route Railroad as well as helping to build the alcan highway. After the war, the locomotive and a few other engines of it's class were sold to the WP&YR.
In 1960 it was retired from 17 years of revenue service. It was then donated and restored to operating condition by Tweetsie Railroad and it was named "Yukon Queen".
As of today it's Operational by Tweetsie Railroad.