Lyman's History of old Walla Walla County, Vol. 1

Chapter I

PHYSICAL AND GEOLOGICAL FEATURES, SOIL, CLIMATE, WATER-COURSES, AND MOUNTAINS

A land of scenic charm, of physical interest, of fertile soil and ample resources, of climate in which living is a delight, of two great rivers and many impetuous tributaries, of mountain chains with rich and varied hues and contours of stately majesty,—such is the imperial domain included in that portion of the State of Washington lying east of the Columbia River and south of the Snake. While this region has distinctive physical features, it yet has a sufficient family resemblance to the other parts of Eastern Oregon and Eastern Washington to indicate a common origin. We may therefore properly take first a general view of this larger area. The greater part of the vast Inland Empire of Northeastern Oregon and Eastern Washington consists of rolling prairies, sometimes fairly hilly, with extensive "flats" in various parts, and low-lying, level valleys bordering the numerous streams. These valleys are usually quite narrow, the three marked exceptions being the broad valleys of the Walla Walla, Umatilla, and Yakima, the two latter being outside of the scope of our story. The Inland Empire varies in elevation above sea-level from about three hundred and fifty feet on the Columbia River to about nine thousand at the highest summits of the Blue Mountains. The larger part of the cultivated portions ranges from eight hundred to two thousand feet. The variations in elevation have a remarkable effect on temperature and rainfall, the former decreasing and the latter increasing very rapidly from the lower to the higher levels. The atmosphere throughout this region is ordinarily very clear, and the majestic sweep of the Blue Mountains and the wide expanses of hills and dales and flats lie revealed in all their imposing grandeur with vivid distinctness.