Columbia River Plateau

The Columbia Plateau first formed as an immense sea of prehistoric, volcanic basalt flow. It is the second largest basalt plateau in the world, but the term “plateau” belies the dramatic cliffs and canyons carved by ice age floods. Towering rock formations and steep gorges straddle the great Columbia River and its tributaries. Orchards of apple and pear form green quilts on the wide, semi-arid terrain. If you think of Washington only in terms of the damp forests and cityscapes of Puget Sound, you will be amazed at the sculpted beauty of this high desert land.

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