The peninsula of California is about one hundred and thirty miles in breadth, where it joins the continent. It extends south-eastwardly, generally diminishing in breadth, till it terminates in two points. The point farthest south-west is called Cape San Lucas. The other, sixty miles east by north of San Lucas, is called Cape Palmo. The peninsula is about seven hundred miles long.
Upper California extends, upon the Pacific, from the 32d parallel of latitude, northward to the 42d parallel, a distance of about seven hundred miles. It is separated from Oregon by a range of highlands, called the Snowy Mountains, or, by the Spaniards, the Sierra Nevada. The eastern limit of Upper California is rather uncertain. By some it is considered as including the region watered by the Colorado River, while others limit it by the great mountain range that extends along the western side of the continent.
The Californian peninsula seems to be a prolongation of the great western chain of mountains. It consists entirely of high, stony ridges, separated by sandy valleys, and contains very few tracts of level ground. In a general view, it might be termed an irreclaimable desert. The scarcity of rain and the small number of springs of water, with the intense heat of the sun's rays, uninterrupted in their passage, render the surface of the country almost destitute of vegetation. Yet in the small oases formed by the passage of a rivulet through a sandy defile, where irrigation is possible, the ground may be made to produce all the fruits of tropical climes, of the finest quality, and in great quantity. The southern portion of the peninsula contains several gold mines, which have been worked, though not to any great extent. On the Pacific side, the coast offers many excellent harbors, but the lack of fresh water near them proves an obstacle in the way of their occupation. The principal harbors are the Bay of la Magdalena, separated from the ocean by the long island of Santa Margarita, the Bay of Sebastian Vizcaino, east of the Isle of Cedaro, Port San Bartolomé, sometimes called Turtle Bay, and Port San Quintin, a good harbor, with fresh water in the vicinity, and called by the Spanish navigators the Port of the Eleven Thousand Virgins.