The Sawtooth Range is one of the best exposed examples of imbricate thrust faulting in the foreland fold and thrust belt of the western United States It is an outstanding field classroom for the demonstration of stratal shortening and the various structural features associated with thrust belt terranes This 7stop traverse through Sun River Canyon offers excellent exposures of thrust contacts along the road and panoramic views of stacked thrust sheets and demonstrates the dependence of structural style on relative competence of units in the stratigraphic section