This photo of Old Faithful somehow looks more realistic than another view that used on the cover of 1947 lunch menu. On the other hand, the clothing and hairstyles of the people in this photo will soon become dated, while there are no people to date the other photo. The real surprise, perhaps, is that Union Pacific issued two menus with different photos of the same subject in the same year.
This one is the last of four that have identical menus on the inside. Although this one does not say what train it was used on, the other Old Faithful menu says that one was used on trains 11 & 12, the Portland-Cheyenne Idahoan (which had through cars to Chicago on the Los Angeles Limited).