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The 3985 Challenger.
Below: Accelerating out of Roseville, California. Headed north to the Feather River Canyon.
Below: UP Challenger #3985 in the Feather River Canyon.
Below: UP Challenger #3985 in the Feather River Canyon.
Below: UP Challenger #3985 in Portola, California
UP Heritage Site
The Union Pacific maintains a site devoted to heritage steam.
See the video
See the Challenger coming out of the Roseville yard.