The Truckee River is about fifty feet in breadth with a shallow but rapid current of clear water. The bottom land is exceedingly fertile, and game is sometimes to be obtained in its neighborhood. The trail crosses the Truckee very frequently, in its winding course, but the country being agreeable, this is not considered toilsome by the emigrant, after traversing the barren plains in the vicinity of Mary's River. The course of the Truckee is nearly from the south-west to the north-east, and in some places it passes between very high mountains, affording scarcely room for travellers to pass. Sometimes the trail is followed through fertile valleys and then over barren hills and rocky passes till the summit of a gap in the mountains is reached, and a pleasant valley opens to the view, offering a fine place for encampment. The trail then turns to the left, and proceeds in a southerly direction, crossing the Truckee several times, until the Truckee Lake breaks upon the view. This small sheet of water is surrounded by lofty mountains, except upon the side where its outlet flows from it. The trail strikes the shore of the lake at its eastern end, and continues around its north-eastern side over a very difficult, boggy road. Having reached the upper end of the lakes, the trail leaves the shore on the right hand, ascends over some rocky hills, and, crossing some deep ravines and swampy ground, arrives at the base of the crest of the Sierra Nevada. Then comes the ascent of the steep pass--a work of difficulty and danger. The mules are compelled to leap from crag to crag, and, when heavily laden, are often precipitated backward in climbing the almost perpendicular rocks. Having attained the summit of the pass, the view is inexpressibly grand and comprehensive. A mile journey upon the top of the mountain brings the traveller to a small lake, surrounded by good grass, which is often used as a place of encampment. Leaving the lake on the right hand, the trail descends over the rocky ground for a few miles, and then enters a beautiful valley about five miles long. Through this valley, which is called the Yuba valley, by the emigrants, flows the Yuba River, a tributary of the Feather River, and the scene of considerable gold digging and washing. This is the commencement of the gold region, and after their journey through the wilderness, here the emigrants greet the "promised land." From this point to Sacramento city, the great terminus of the overland emigration, it is about sixty miles; but the trading post of Yuba, Johnson's ranche, Vernon, and the other posts, offer convenient intermediate resting places.