Big Boy 4014 excursion route in California

I was wondering what route the 4014 traveled on in October for the public excursions. Was it the Cajon sub West Colton-Barstow? But isn't that BNSF? Or does UP have trackage rights on BNSF? There is a Cajon Sub that's only part of the route on the DLS, but fully landscaped with track, and a blank DEM of the complete route by fishlipsatwork. I could merge the completed route into the DEM by deleting baseboards from the DEM and finish the rest of the route myself. I downloaded a nice Big Boy 4104 from Trainz Forge, it is better than the others with better textures and detail. My downloads are turtle speed because my fct ran out. The Cajon blank DEM is taking over an hour or so to download. I have to renew my FCT. Does anyone know a good set of UP yellow coaches besides diecastgalore? The domes by him you can ride in the dome part.