Formed between 12,000 to 15,000 years ago by the MIssoula Floods, Lake Coeur d'Alene is a popular summer recreation area in Idaho. At 25 miles long and with over 100 miles of shoreline, the lake is an ideal location for boating.

From the Northwest Historical Postcards Collection. We’ll be featuring vintage postcards from the Northwest all summer, so stay tuned for travel recommendations.