Postcard #4 in the Wyoming series.
This postcard view of Jackson Lake and the Teton Range is unused and undated. Published by the Union Pacific Railroad these postcards were distributed by the Railroad to spread the word of the wonders of the West. (In other words, an advertising postcard).
It is a “linen finish” postcard. Linen finish postcards have a range of from 1930 through 1944.
There is a card number in the stamp area, 81896.