Wild Life on the Rockies by Enos A. Mills

It is stirring to stand at the feet of the Rocky Mountains and look upward and far away over the broken strata that pile and terrace higher and higher, until, at a distance of twenty-five or thirty miles, they stand a shattered and snowy horizon against the blue. The view is an inspiring one from the base, but it gives no idea that this mountain array is a magnificent wild hanging-garden. Across the terraced and verdure-plumed garden the eternal snows send their clear and constant streams, to leap in white cascades between crowning crags and pines. Upon the upper slopes of this garden are many mirrored lakes, ferny, flowery glens, purple forests, and crag-piled meadows.

If any one were to start at the foothills in Colorado, where one of the clear streams comes sweeping out of the mountains to go quietly across the wide, wide plains, and from this starting-place climb to the crest of this terraced land of crags, pines, ferns, and flowers, he would, in so doing, go through many life-zones and see numerous standing and moving life-forms, all struggling, yet seemingly all contented with life and the scenes wherein they live and struggle.