TOPOGRAPHY OF WASHINGTON TERRITORY.

Washington Territory will make one of the largest States of the Union. It is larger than England and Wales combined, as will be seen by the following table:

Washington Territory66,880squaremiles.
New York47,620""
Virginia40,125""
England and Wales58,320""

The shape of the Territory is regular, having the general form of a parallelogram, with its longer axis running east and west. Its relief is simple. Along the Pacific coast runs the Coast Range of mountains from the mouth of the Columbia River to the Straits of Juan de Fuca. In this range there is only one practicable opening from the interior, which is the trough of the Chehalis River, which terminates in Gray's Harbor. The bar here, as at the mouth of Columbia River, forms a serious obstruction to the entrance of vessels drawing more than twenty feet of water.

Sixty miles east of the Coast Range, and parallel to it, runs the Cascade Range, which divides the Territory by a north and south line. It is a lofty range, presenting a serrated outline, whose lower depressions are 3,000 to 4,000 feet above tide, while summits of 5,000 to 8,000 feet are common; and at intervals still higher peaks raise their snow-covered heads from 8,000 to 14,500 feet.

Between the Cascade Mountains and the Coast Range lies Puget Sound, with its outlet through the Strait of Fuca. South of this sound, and on each side, are wide spaces of flat and rolling country, with numerous and somewhat disconnected mountains of comparatively small size, though some of them rise as high as 1,500 feet. These mountains show many natural terraces, which may be the result of land-slides.

LAKE WASHINGTON—SHOWING MOUNT RANIER IN THE DISTANCE—ON LINE OF SEATTLE, LAKE SHORE AND EASTERN RAILWAY.

Puget Sound.The Puget Sound basin is exceedingly well supplied with streams and lakes; whilst the Sound itself, with its sheltered position, its deep water, and indented shore-line, is one of the most interesting and valuable inland bodies of water in the world. It has a broad outlet to the ocean. Lake WashingtonLake Washington. is a beautiful and navigable sheet of water. There are numerous other lakes scattered over the Territory, enlivening its scenery and often affording convenient waterways. Quite a number of the rivers emptying into Puget Sound are partially navigable for small steamers. The rivers and creeks generally have bottom-lands, which are sometimes narrow, and sometimes wide. Cowlitz River flows south into the Columbia River. It has fine bottom-lands, and its valley may be regarded as a prolongation and complement of the Willamette Valley, Oregon.

West Washington and East Washington.All the country lying west of the crest-line of the Cascade Mountains is known as West Washington, and is quite different in topography, as in many other respects, from the country known as East Washington, which name applies to all of the Territory lying east of the Cascade axis.

East Washington is a rectangular plateau, set in a frame of mountains, and drained by the Columbia River and its tributaries. The Cascade Range being the west side of the frame, the north side is formed by irregular spurs which run out at right angles from the Cascade Mountains along the Canada border, and connect with the Cabinet Mountains. The east side of the frame is in Idaho, and consists chiefly of the Cœur d'Alene Mountains. On the south lie the Blue Mountains, which are partly in Washington Territory, but chiefly in Oregon. The mountains on the north have a few peaks 5,000 to 9,000 feet high, and many of the dividing ridges are high, steep and rugged. Much of the region is described, however, as high plateau country, dotted over with small, conical mountains. It abounds in streams of water, generally small. A strip of arable land runs on the east side of the Columbia River from the mouth of the Spokane River to the mouth of the Colville River and the valleys of Colville and the Little Spokane River are highly spoken of as agricultural regions. The elevation of these river valleys is from 1,200 to 1,600 feet above tide-water.

Passing to the east side, we find the plateau country at its north corner extending to the Idaho line where the foot-hills of the Rocky Mountains begin, and soon rise into the Cœur d'Alene Mountains.Cœur d'Alene Mountains, which—being the local name for part of the Bitter Root Range—is a part of the western branch of the Rocky Mountains. The Cœur d'Alene River and Lake belong to the Columbia River basin, and are so naturally connected in mining and trading interests with Washington Territory, that in another connection I shall have much to say of the Cœur d'Alene country, as also of the Colville country, and other parts of the mountain rim. South of the Cœur d'Alene Lake the plateau country extends far into Idaho, and gives to that State its best farming lands.

The Blue Mountains which mark the southern limit of the plateau in Washington Territory do not extend more than half-way across the plain, leaving a long projection of the plateau to extend southward into Oregon.

The Great Plateau.The shape of the plateau in Washington Territory is an irregular square with a diameter each way of about 150 miles. Followed into Idaho and Oregon, the diameters would reach 200 miles. Its surface is generally smooth, but there are frequent patches of rock, and sometimes large areas are roughened by rocky outcrops. The plateau is elevated and rolling, rising from 1,000 to 3,000 feet above the surface of Columbia River. Its elevations usually are mere swells, except along the precipitous edges of coulées. I know of only one mountain upon it, and that is quite a small one; but it served as a refuge for Lieutenant Steptoe and his handful of soldiers when attacked by the Indians; and hence is called Steptoe Butte. The surface of the plain is scarred in a number of places with couléesCoulées., or dry river-beds, which are cut down twenty to one hundred feet, and sometimes more, and their sides are usually marked by bluffs, often of rock. These coulées are an advantage, or a disadvantage, in road-making, according to whether the road goes with, or across, the coulée. The Northern Pacific Railroad found it convenient to use one of them for a long distance. The deepest cuts in the plateau are made by its rivers. Of these the Columbia is chief. This river, as already intimated, has cut a channel for itself along the north and west edge of the plain from 1,000 to 2,000 feet below the general level. The Snake River, which is the largest affluent of the Columbia, has numerous branches, all cut deep into the basalt which underlies the plain.

Columbia and Snake Rivers.The Columbia and Snake are both steamboat rivers, but navigation is interrupted by rocky rapids, which prevent through lines of steamers. The Columbia is one of the largest rivers in the world, and has abundant water for steamboats from its mouth to a point in Canada, north of Farwell, where it is crossed by the Canadian Pacific Railway, and steamboats run at intervals to the most northerly point; and there are navigable stretches not yet used for boats which will have steamers in connection with future railroads. The steamers on Snake River are very useful, and run to Lewiston, in Idaho, and perhaps further.

This plateau, or Great Plain of the Columbia, as it is called sometimes, is a most interesting and important region, concerning which I shall have much to say under subsequent heads.