This Sun Valley menu doesn’t have a date, but judging from the prices it is from the late 1960s. It also doesn’t mention Union Pacific anywhere except in tiny letters for the photo credit, which would confirm it is from after 1964 when UP sold the Sun Valley resort. As a result, this isn’t quite railroad memorabilia.
The menu purports to have an a la carte section and a “Wednesday dinner menu” (which suggests that the lodge rotated menus by day of the week). In fact, both sections offer nearly complete meals, with “soup, vegetable, potato, salad, bread, [and] beverage.” Entrées include sirloin steak, filet mignon, chicken, lamb chops, trout, calf sweetbreads, pork chops, prime rib, and crab. There must not have been many vegetarian skiers in those days. Appetizers and dessert were both extra.