The Columbia Plateau, covering southwest Idaho, is characterized by fertile plateaus and valleys. Containing deep valleys and grassy plateaus separated by many small mountain ranges, the Basin and Range region is located in the state's southeastern corner. Flowing for 1,671 kilometers, mostly with Idaho's borders, the Snake River is the state's longest river. The population of the state is a little over one million. However, in the mountainous areas frigid temperatures can occur.
Elevation plays an important role in temperature differences across the state.
In Boise, temperatures range from an average of 24 C in July to an average of -3 C in January. In Idaho Falls, the average July temperature is 21 C, while the average January temperature is -9 C. Annual precipitation varies throughout the state, from less than 25 cm of precipitation in some areas to as much as 508 cm of snow on the highest mountains. Cultural Profile Idaho's museums preserve the state's rich Indian, pioneer, and mining heritage. Performing arts organizations in Boise include the Boise Philharmonic, the American Festival Community Concerts, the Boise Little Theatre, and the annual Idaho Shakespeare Festival. Among the other performing arts groups in the state are the Carousel Players and the Coeur d'Alene Community Players in Coeur D'Alene, and the American Festival Ballet Company and the Main Street Dance Company in Moscow.