Okanogan Highlands

region, Washington, United States

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July 1, 2026

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The Okanogan Highlands are a physiographic region in northeastern Washington, United States, and are an extension of the Rocky Mountains. This area features north-south mountain ranges with summits exceeding 7,000 feet (2,100 meters), separated by glaciated valleys. The region is significant for containing most of Washington's metallic ores. The Okanogan River, which flows into the Columbia River in northeastern Washington, is also associated with this area. The Columbia Plateau borders the Okanogan Highlands to the west.123

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Washington
Relief and drainage
The Okanogan Highlands, in the northeast, are an extension of the Rocky Mountains. Their north-south ranges, with summits that rise to more than 7,000 feet (2,100 meters), are separated by glaciated trenches. Most of the state’s metallic ores are found in this region.
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The Okanogan Highlands, in the northeast, are an extension of the Rocky Mountains. Their north-south ranges, with summits that rise to more than 7,000 feet (2,100 meters), are separated by glaciated trenches. Most of the state’s metallic ores are found in this region.
Read More