The only very rugged part of the route is in crossing the Big Horn mountain, which is about 30 miles wide.
William Henry AshleyWe continued to move forward without loss of time, hoping to be able to reach the wood described by the Indians before all our horses should become exhausted.
William Henry AshleyHaving now reached a point where danger might be reasonably apprehended from strolling war parties of Indians, spies were kept in advance and strict diligence observed in the duty of sentinels.
William Henry AshleySnow is so common that I have omitted to note its falling at least two days out of Three.
William Henry Ashley