Yuma is a city located in the southwestern corner of Arizona, on the Colorado River. It is the county seat of Yuma County and has a population of around 95, 000 people. Utah is a state located in the western United States, bordered by Idaho, Wyoming, Colorado, and Arizona. It is home to the Great Salt Lake and has a population of around 3 million people. ASPEN is a city located in the Rocky Mountains of Colorado, on the Roaring Fork River. It is known for its ski resorts and has a population of around 7, 000 people.