We’re here on the western edge of the Northern Rocky Mountains, and spring has arrived in the rivers and canyons that drain the high country. In general, our weeklong journey follows the flow of the water westward, toward the ocean. However, this morning we started our adventure by travelling upstream. We moved up the Snake River, southward and deep into Hells Canyon. Our comfortable home, National Geographic Sea Bird, was tied up in the Port of Clarkston. We used contract jet boats for the trip today. These boats use powerful motors to drive water through a turbine pump, allowing the boats to fly against the current in only a few inches of water. The Clarkston/Lewiston area is a center for jet boat manufacturing and activity in the U.S.