Washington State's Mountain Ranges: A Comprehensive Overview

* Cascade Range: The Cascade Range stretches from British Columbia, Canada, through Washington and Oregon, to northern California.

* Olympic Range: The Olympic Range lies on the Olympic Peninsula in western Washington. The highest peak is Mount Olympus, which is also the highest mountain in the Pacific Northwest.

* North Cascades: The North Cascades are a sub-range of the Cascade Range and lie mostly in Washington state, with a small portion extending into British Columbia.

* Selkirk Mountains: The Selkirk Mountains extend from Idaho into northeastern Washington and British Columbia.

* Columbia Mountains: The Columbia Mountains extend from northwestern Montana into Washington and British Columbia.

* Wenatchee Mountains: The Wenatchee Mountains are located east of the Cascade Range in central Washington.

* Okanogan Highlands: The Okanogan Highlands include mountains located northeast of the Cascade Range that stretch from southern British Columbia through northern Washington