Greetings from the USA! :)
Thank you dear Cassie for the lovely postcard. :) Unfortunately, the postcard doesn't say anything about this gorgeous view, so I tried to google it but I'm not sure of the information I found. These mountains look like they're the Rocky Mountains and that might be the Maroon Lake in front of them. Please correct me if I'm wrong! Unfortunately, I don't have much knowledge about the mountains range. :(
Beautiful stamps. :)