In the expedition sent across the continent by Mr. Astor, in 1811, under command of Captain Wilson P. Hunt, that gentleman met with the first serious obstacle to his progress at the base of this range. After numerous efforts to scale it, he turned away and followed the valley of the Snake, encountering the most discouraging disasters until he arrived at Astoria.
Later, in 1833, the indomitable Captain Bonneville was lost in this mountain labyrinth, and, after devising various modes of escape, finally determined to ascend the range, which tremendous task he succeeded in accomplishing, in company with one of his men. It was this same line of snow-clad, craggy peaks that turned back Captain Raynolds in 1859.
BREAKING THROUGH.
Near its mouth the Upper Yellowstone is about half the size of the main stream as it leaves the lake. Its valley is about three miles wide and very marshy; all the little streams flowing down from the wooded hill-slopes being obstructed by beaver-dams, so as to form continuous chains of ponds. The sides of the valley are dark, sombre walls of volcanic rock, which weathers into curious and imposing forms. Looking up the valley from some high point, one almost imagines himself in the presence of the ruins of some gigantic city, so much like ancient castles and cathedrals do these rocks appear—a deception that is not a little heightened by the singular vertical furrows cut deep into the cliffs. At the base of the walls immense masses of breccia have fallen from the mountain tops, in many instances cutting long swaths through the pine forests. In the upper part of the valley, which in midsummer is lush with vegetation, five streams flow down from the mountains to swell the waters of the Yellowstone. These streams Colonel Barlow calls, in honor of his commander's greatest victory, the Five Forks. Here the valley terminates abruptly, the mountains rising like walls and shutting off the country beyond. Just at the head of the valley is a little lake, a hundred yards or so in width; the large lake which has been placed on maps as Bridger's Lake having no existence. Dr. Hayden with two assistants ascended the mountains to the west of the head of the valley to survey the district bordering on the great divide. From this point as far as the eye can reach on every side are bare, bald peaks, domes and ridges in great numbers. At least one hundred peaks worthy of a name can be located within the radius of vision. The rocks everywhere, though massive, black, and deeply furrowed vertically, have the appearance of horizontal stratification. In some instances the furrows are so regular that the breccia has a columnar appearance. The summits of the mountains are composed entirely of breccia, containing angular masses of trachyte, from 10 to 30 feet in diameter, though most of the fragments are small. Dr. Hayden's party camped at night near a small lake, by the side of a bank of snow, 10,000 feet above the sea, with short spring grass and flowers all around them. There are but two seasons on these mountain summits, spring and winter; as late as August fresh new grass may be seen springing up where a huge bank of snow has just disappeared. Little spring-flowers, seldom more than two or three inches high, cover the ground—Clatonia, Viola, Ranunculus, and many others. The following morning they travelled for several miles along a ridge not more than two hundred yards wide, from one side of which the waters flow into the Pacific, and on the other, into the Atlantic. To the westward the outlines of the Teton Range, with its shark-teeth summits, are most clearly visible, covered with snow. From whatever point of view, the sharp-pointed peaks of this range have the form of huge sharks' teeth. To the southward, for fifty miles at least, nothing but igneous rocks can be seen. Toward the Tetons there is a series of high ridges, passing off from the main Teton Range toward the northeast, and varying in height from 9,500 to 10,500 feet above the sea, and from 1,000 to 1,800 feet above the valleys at their base.
The explorers ascended one of the high ridges, (not the highest, however,) and found it to be 1,650 feet above the valley at its foot. The northeast side is steep like a roof, the southwest breaking off abruptly. From the summit of this ridge, the view is grand in the extreme. To the westward the entire country, for the distance of fifty miles, seems to have been thrown up into high, sharp ridges, with gorges 1,000 to 1,500 feet in depth. Beautiful lakes, grassy meadows also, come within the field of vision. "I can conceive," says Dr. Hayden, "of no more wonderful and attractive region for the explorer. It would not be difficult for the traveller to make his way among these grand gorges, penetrating every valley, and ascending every mountain and ridge. The best of grass, wood, water and game are abundant to supply the wants of himself and animals.
"I think," he continues, "that numerous passes could be found from the valley of Snake River to the basin of the Yellowstone. It seems to me there are many points on the south rim of the basin where a road could be made with ease into the valley of Snake River. From this ridge there appears to be but little difference in the altitude of Yellowstone Lake and Heart Lake, and they cannot be more than eight or ten miles apart, and yet the latter is one of the sources of Snake River. The little branches of Snake River nearly interlace with some streams that flow into the lake, and the gullies come up within two miles of the shore-line. There is a very narrow dividing ridge in one place, between the drainage, which may be within one mile of the lake."
Heart Lake was visited by Colonel Barlow, who found it a pretty, pear-shaped sheet of water, four miles long and two wide in its broadest part. From the north it receives a warm creek fed by a considerable group of hot springs. Its outlet at the southern end joins the terminal creek of Snake River, a few miles from its source among the Yellowstone Mountains.