Simultaneously, through the exploration of industrious prospectors, all the many amazingly curious formations which now render the region one of incomparable natural marvels were discovered, and the settlements of Manitou and Colorado Springs were presently made. Pike’s Peak has been, since the time of Ruxton’s ascent, an object of great interest to travelers, and as early as 1852 a rough foot-trail was established to the summit, which was greatly improved twenty years later so as to admit the passage of vehicles. In the meantime, the towns of Manitou and Colorado Springs had grown steadily and the number of visitors increased until some one conceived the idea of constructing a railroad from the base to the summit. This idea was seized upon by some eastern capitalists in 1884, and a large capital being subscribed for the purpose, the work of building this unique road was begun. The original company, however, met with difficulties which they were unable to overcome for lack of capital, and in 1888 a second organization, under the title of Manitou & Pike’s Peak Railway Company, succeeded the first corporation, and adopting what is known as the Abt Cog-wheel System of Mountain Climbing, renewed the work thus interrupted. As the higher altitudes were reached the air became so rare that labor was extremely difficult, so that the strongest men were unable to exert themselves for more than a few minutes at a time. In place of wagons burros were employed to carry on their sturdy little backs all the needful materials of ties, rails, tools and spikes, up the steep mountain side, and without them the obstacles would have been insuperable. But thus the work went on until the 20th of October, 1890, when the last spike was driven and the highest railroad in the world received its finishing stroke. Special locomotives and cars were built and by the use of cog-wheels the pinnacle of Pike’s Peak was thereafter to be gained comfortably, if not swiftly. The length of the road leading to the summit is nine and one-quarter miles, and at times the grade seems positively appalling (being 25 per cent.) as the noisily-laboring engine pushes the passenger coach up the devious way, over great bowlders that have been flung down by some Titan from immense heights above; under overhanging brows of threatening cathedrals of stone; over mad-dashing waterfalls; through ever-green forests of silver pines, then into groves of dwarf aspens, until at length the route reaches up and on above the timber line. The steepness of the way still continues, but there are no longer abutting rocks, nor rush of water; the mountain now becomes a measureless pile of broken stones, between which the chipmunk and woodchuck play hide and seek; mists of clouds begin to gather, the snow line shows itself beyond the breath of summer, and a cold wind rushes around the peak making sport of the enterprise that invaded their frigid solitude.