Seventeen-year-old Tim Scott, an oarsman, and his friend John Mills, a hunter, share many adventures after being selected to participate in the historic Lewis and Clark Expedition.
Bill and his brother Curt survive a risky trip down the Mississippi as members of a flatboat crew, only to have to make the much more dangerous trip back along the bandit-ridden Trace trail.
Liz embarks on a grand adventure filled with new friends and experiences, as well as danger, when she joins her father on his eight-hundred-mile journey along the Santa Fe Trail.