The famous Spokane Falls are in Washington, about thirty miles below the lake, where the river is outspread and divided and makes a grand descent from a level basaltic plateau, giving rise to one of the most beautiful as well as one of the greatest and most available of water-powers in the State. The city of the same name is built on the plateau along both sides of the series of cascades and falls, which, rushing and sounding through the midst, give singular beauty and animation. The young city is also rushing and booming. It is founded on a rock, leveled and prepared for it, and its streets require no grading or paving. As a power to whirl the machinery of a great city and at the same time to train the people to a love of the sublime and beautiful as displayed in living water, the Spokane Falls are unrivaled, at least as far as my observation has reached. Nowhere else have I seen such lessons given by a river in the streets of a city, such a glad, exulting, abounding outgush, crisp and clear from the mountains, dividing, falling, displaying its wealth, calling aloud in the midst of the busy throng, and making glorious offerings for every use of utility or adornment.
From the mouth of the Spokane the Columbia, now out of the woods, flows to the westward with a broad, stately current for a hundred and twenty miles to receive the Okinagan, a large, generous tributary a hundred and sixty miles long, coming from the north and drawing some of its waters from the Cascade Range. More than half its course is through a chain of lakes, the largest of which at the head of the river is over sixty miles in length. From its confluence with the Okinagan the river pursues a southerly course for a hundred and fifty miles, most of the way through a dreary, treeless, parched plain to meet the great south fork. The Lewis, or Snake, River is nearly a thousand miles long and drains nearly the whole of Idaho, a territory rich in scenery, gold mines, flowery, grassy valleys, and deserts, while some of the highest tributaries reach into Wyoming, Utah, and Nevada. Throughout a great part of its course it is countersunk in a black lava plain and shut in by mural precipices a thousand feet high, gloomy, forbidding, and unapproachable, although the gloominess of its canyon is relieved in some manner by its many falls and springs, some of the springs being large enough to appear as the outlets of subterranean rivers. They gush out from the faces of the sheer black walls and descend foaming with brave roar and beauty to swell the flood below.
From where the river skirts the base of the Blue Mountains its surroundings are less forbidding. Much of the country is fertile, but its canyon is everywhere deep and almost inaccessible. Steamers make their way up as far as Lewiston, a hundred and fifty miles, and receive cargoes of wheat at different points through chutes that extend down from the tops of the bluffs. But though the Hudson's Bay Company navigated the north fork to its sources, they depended altogether on pack animals for the transportation of supplies and furs between the Columbia and Fort Hall on the head of the south fork, which shows how desperately unmanageable a river it must be.
A few miles above the mouth of the Snake the Yakima, which drains a considerable portion of the Cascade Range, enters from the northwest.
It is about a hundred and fifty miles long, but carries comparatively little water, a great part of what it sets out with from the base of the mountains being consumed in irrigated fields and meadows in passing through the settlements along its course, and by evaporation on the parched desert plains. The grand flood of the Columbia, now from half a mile to a mile wide, sweeps on to the westward, holding a nearly direct course until it reaches the mouth of the Willamette, where it turns to the northward and flows fifty miles along the main valley between the Coast and Cascade Ranges ere it again resumes its westward course to the sea. In all its course from the mouth of the Yakima to the sea, a distance of three hundred miles, the only considerable affluent from the northward is the Cowlitz, which heads in the glaciers of Mount Rainier.
From the south and east it receives the Walla-Walla and Umatilla, rather short and dreary-looking streams, though the plains they pass through have proved fertile, and their upper tributaries in the Blue Mountains, shaded with tall pines, firs, spruces, and the beautiful Oregon larch (Larix brevifolia), lead into a delightful region. The John Day River also heads in the Blue Mountains, and flows into the Columbia sixty miles below the mouth of the Umatilla. Its valley is in great part fertile, and is noted for the interesting fossils discovered in it by Professor Condon in sections cut by the river through the overlying lava beds.
The Deschutes River comes in from the south about twenty miles below the John Day. It is a large, boisterous stream, draining the eastern slope of the Cascade Range for nearly two hundred miles, and from the great number of falls on the main trunk, as well as on its many mountain tributaries, well deserves its name. It enters the Columbia with a grand roar of falls and rapids, and at times seems almost to rival the main stream in the volume of water it carries. Near the mouth of the Deschutes are the Falls of the Columbia, where the river passes a rough bar of lava. The descent is not great, but the immense volume of water makes a grand display. During the flood season the falls are obliterated and skillful boatmen pass over them is safety;
while the Dalles, some six or eight miles below, may be passed during low water but are utterly impassable in flood time. At the Dalles the vast river is jammed together into a long, narrow slot of unknown depth cut sheer down in the basalt.
