In 1901, almost a century after Lewis and Clark toiled along the same route, noted writer James Willard Schultz and his Blackfeet wife Natahki (Fine Shield Woman) made a float trip on Montana's Missouri River from Fort Benton to the mouth of the Milk River, a distance of more than 200 miles. In a small boat, they passed through what is now the Upper Missouri National Wild and Scenic River, the Upper Missouri River Breaks National Monument, and the...