We're focusing on the back roads of America today. And it's a rich part of our history, exploring the little-traveled reaches of our countryside. It was back in 1804 when forty military men and a huge black Newfoundland dog, led by Meriwether Lewis and William Clark, set out on what was then an outrageously dangerous attempt to canoe from St. Louis, Missouri, to the Pacific Ocean. It has been said that they knew less about what lay in store for them than the astronauts knew about the moon. And the journals Lewis and Clark kept reflect the hardships, especially the unforgiving winters. This summer, a producer, Barrett Golding, and his buddy Joe are retracing the Lewis-and-Clark expedition route on mountain bikes. Barrett is chronicling his adventure for The Savvy Traveler, leaving us a steady stream of messages.