"We're crossing the Columbia River Gorge in Astoria, Oregon. Emotionally, this was difficult because I knew the end of the trip was near," Wolter says. "Although I felt a lot of pride in the fact that we'd made it on these bikes, I also [felt] a lot for the Lewis and Clark expedition, which had no available supplies and had to deal with truly rugged terrain. It gave me a great appreciation for what these guys went through with no supplies. And the terrain is hard."