The Colorado River flows 1,500 miles (2,400km) – through rises and rapids, valleys and deserts, all the way to Mexico. But this river of critical importance to our country is facing incredible challenges. The Colorado River provides water to almost 40 million Americans, but it is still reeling from the impacts of a 17-year drought that has drained most of Lake Mead and left Arizona and Nevada on the brink of imposed shortages. The struggle we face to protect the Colorado River basin is one of necessity, not choice.