The cattle boom reached its height by 1885, then the range became too heavily pastured to support the long drive, and was beginning to be criss-crossed by railroads.

养牛业的兴旺发达，到1885年到达最高峰，当时的高原，已经不足以供这么多长征牛群吃草的需要了，而且这些草原，也开始被纵横交错的铁路线所割裂。