I'm glad to see on the Union Pacific 844 Steam Tour twitter feed they clarified which of the two possible routes they will take from Oakland to Stockton. They will come down the ex-SP route through Newark and Fremont, passing through Centerville, and from Niles Junction to Stockton on the ex-WP route (the route of the Altamont Commuter Express). I figured that is what they would do, but they at least technically could have used the ex-WP route all the way from Oakland. I thought it unlikely on account of the ex-WP west of Niles Junction is downgraded and slow, but I wasn't certain. Now I know I can walk over to Centerville station with my camera and Cheryl's unipod at 9 AM tomorrow morning to get pictures of the steam tour coming through. I expect the place will be crowded.