Quote from : Rough-Hewn Land: A Geologic Journey from California to the Rocky Mountains Book

Colorado and Wyoming are America’s highest states, averaging 6,800 feet and 6,700 feet above sea level. Utah comes in third at 6,100 feet, New Mexico, Nevada, and Idaho each break 5,000 feet, and the rest of the field is hardly worth mentioning. At 3,400 feet, Montana is only half as high as Colorado, and Alaska, despite having the highest peaks, is even further down the list at 1,900 feet. Colorado has more fourteeners than all the other U.S. states combined, and more than all of Canada too. Colorado’s lowest point (3,315 feet along the Kansas border) is higher than the point in twenty other states. Rivers begin here and flow away to all the points of the compass. Colorado receives no rivers from another state (unless you count the Green River’s’ brief in and out from Utah).Wyoming’s Wind River Range is the only mountain in North America that supplies water to all three master streams of the American West: Missouri, Colorado, and Columbia rivers.