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View Trail Map in AppA Discover Pass is required for parking at the Mount Si Trailhead; purchase at recreation.wa.gov or at self-pay stations. The trailhead parking lot fills before 8 AM on weekends and holidays — arrive early or use the overflow lot. Dogs must be on leash.
Path Type
There and Back
Mount Si begins at the Mount Si Trailhead (~741') on SE Mount Si Road in North Bend, Washington.
From the trailhead, follow the Mount Si Trail north through second-growth and old-growth Douglas fir and western hemlock on a well-maintained, signed path. The trail climbs via sustained switchbacks through forest with minimal flat sections throughout. The grade eases briefly around 2,500' where the forest character shifts, then steepens again toward the summit ridge. The trail tops out on the broad rocky summit area at approximately 4,140', with views extending west to Puget Sound and the Olympic Mountains, south to Mount Rainier, and north to the North Cascades. The Haystack — the exposed rocky spire at the very summit — is an optional Class 3 scramble adding approximately 200 vertical feet; it is not required to enjoy the summit views and involves genuine exposure. Many hikers stop at the main summit area. Return on the same trail.
Begin early on weekends — the trailhead parking lot fills before 8 AM year-round.
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