Credits:Steve F. Russell, Iowa State University; Steve Matz, Salmon-Challis National Forest; Mike Crosby, Peter Sozzi and Steve Wright, Bureau of Land Management, Salmon, Idaho; David Alt, geologist, University of Montana; Smoke Elser, outfitter-guide, Missoula, Montana; Larry Jones, Idaho Historical Society; George Oberst, Montana Historical Society.

Photos:Jim Wark, Airphoto, Pueblo, Colorado; Beinecke Library, Yale University; Idaho Historical Society; Montana Historical Society; Special Collections, Lewis & Clark College, Portland, Oregon; The Estate of Edwin Tunis; Bewdley Museum, Worcestershire, England.

Principal Reference: James R. Fazio, Across the Snowy Ranges: The Lewis and Clark Expedition in Idaho and Western Montana (Moscow, Idaho: Woodland Press, 2001)

The support of the Idaho Governor's Lewis and Clark Trail Committee is gratefully acknowledged.