The well-known Yosemite Valley is the gorge of the Merced River and, though only eight miles long and half a mile wide, holds the grandest of all our mountain scenery. The mighty rock El Capitan, over three thousand feet in height, stands at the entrance to the valley, and across from it is Bridal Veil Fall, a snowy cascade so thin you can see the face of the mountain through the falling waters. There are many waterfalls, but the Yosemite is chief of them all. Here the river takes a plunge of sixteen hundred feet, the water falling like snowy rockets bursting into spray from that great height. Then, for six hundred feet more, the torrent leaps and foams through a trench it has cut out of the solid rock to the cliff, from which it takes a second plunge. This Lower Yosemite fall is four hundred feet high, the rushing waters turning into clouds of spray, which the wind tosses from side to side. At Nevada Fall the Merced River leaps six hundred feet at a bound, strikes a mass of rocks halfway down, and breaks into white foam upon which rainbows play when the sun shines through the misty veil. Besides the grand Sentinel Rock, Eagle Peak, Clouds' Rest, and other high mountains in the Yosemite Valley, many domes or round-topped peaks like the heads of buried giants loom up, the most famous being South Dome, Washington Column, Liberty Cap, and Mount Broderick. But no one can picture this wonderful valley with pen or brush or camera and give its real charm. You must see it yourself to know and understand the beauty of great mountains and falling waters, of Mirror Lake with its fine reflections of the surrounding scenery, and of the rushing torrent of the Merced River in its swift coursing through this mighty cañon of the Yosemite. Thousands of tourists and sightseers visit the valley from May to October. Then snow begins to fall and winter sets in, as it does everywhere in the high Sierras. Very deep snow-drifts cover the ground, lakes and rivers freeze, and the great falls are fringed with icicles, while a large ice cone forms at the foot of the falling water. Many beautiful pictures may be found in the valley in winter when Jack Frost is ruler of all the snow-clad, ice-bound cañon. Scattered throughout the Sierras are other valleys almost as fine as the Yosemite. These are not often reached by the army of summer sight-seers, but true mountaineers find them. One valley which has fine scenery is the Grand Cañon of the Tuolumne, the gorge being twenty-five miles long, with walls so high and steep that once entered one must go through to the end. The Tuolumne River rushes, with terrible force and speed, in cascades and rapids down the granite stairway which is the floor of this cañon. The walls of the gorge rise so high that the traveller only sees a tiny strip of blue sky far above him, and the great pine trees on top of these cliff walls seem only the length of one's finger.