King County Activities
Mount Si Trailhead, King County
An eight-mile round trip, Mount Si is a beautiful introduction to the Cascade Mountains—the length (plus 3,150 ft. in elevation gain) make it a challenging trek, but the scenery and views from the top are more than worth it. Make sure to purchase a discover pass in advance, so you can park at the trailhead. Arrive early, as this is one of the most popular hikes in the state.
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