Mount Si via Mount Si Trail

30 reviews #1 hike out of 60 in
7.6 mi
Distance
3 hrs 8 min
Time
terrain
3,252 ft
Elev Gain

Overview

Located along Washington state's I-90 corridor, the popular 8-mile out and back Mount Si trail gives hikers a wide-open view of the town of North Bend and surrounding mountains from atop its craggy haystack. With close access to the city (a 45-minute drive east of Seattle), Mount Si can get crowded with those wanting to escape the city without traveling too far. Despite the foot traffic, the trail still manages to offer a hike just challenging enough and beautiful enough to make it all worthwhile.

Getting Started

The trailhead is located at the far end of the parking lot, between the restrooms (pit toilets) and the information board.

Most of the trail remains in the trees giving shade from the sun and protection from wind. Mount Si's lower elevation allows hikers to enjoy the trail year-round, though snow does cover higher parts of the trail throughout the winter months.

Gaining 3,100 feet in roughly four miles provides a workout for anyone, and the trail gradually gains elevation with switchbacks. After the first 1.5 miles, hikers reach Snag Flat, where old-growth trees tower overhead and hikers can catch a breath and a break from the steady elevation gain before the next set of switchbacks.

Nearing the top of the trail, the surrounding Central Cascade Mountains come into view. Continue further and reach a rocky overlook. On a clear day, views of Mount Rainier appear to the south. Continue up the rocky steps to the base of the Haystack, Mount Si's true summit. Some hikers choose to scramble up the exposed rock while others take in the views and enjoy a snack before returning back to the trail and to the parking lot.

A Discover Pass is required to park at the trailhead, which gets very congested during the summer months. Buy an annual pass or pay at the trailhead.

Taking Children

For kids who like the outdoors, Mount Si is a perfect combination of safety (close to the city, plenty of people), and strenuous activity with a serious reward: sweeping views of the valley below.


Sights to See


    Rate this Hike

    user_profile
    8 months, 1 week ago
    The first two thirds of the hike is the best. Amazing forested experience. The last third is lots of dead underbrush and there isn’t much to look at. The Boulderfield that you encounter as soon as it opens up just before you reach the peak is a serious thing to traverse.
    ★ ★ ★ ★

    user_profile
    1 year, 8 months ago
    If it wasn’t for the haystack scramble at the top, I would say look elsewhere as this is pretty much a treadmill.
    ★ ★ ★ ★

    user_profile
    2 years, 3 months ago
    Trip Report: 02/15/2020 Muddy and wet for the first 3 miles but snow packed post that. Micro spikes could prove useful on the way down if not on the way up; once people start breaking trail, the snow gets packed and starts becoming slippery.
    ★ ★ ★ ★

    user_profile
    2 years, 6 months ago
    Beautiful hike .
    ★ ★ ★ ★ ★

    user_profile
    2 years, 8 months ago
    Classic little hike. Defiantly a must do for classics in the area. Great 4th class optional "Haystack" scramble at the top as well.
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    user_profile
    3 years ago
    Such a fun social hike!
    ★ ★ ★ ★ ★

    user_profile Gaia GPS staff
    3 years, 1 month ago
    Si is good for a training hike (i.e. carrying lots of weight) but there are many hikes in the area that have less people, better views, and more interesting hiking in general. Trail is in fine shape. Almost all of the snow on trail is melted out minus a few sloppy sections near the top that won't last much longer with the warm temps and heavy foot traffic.
    ★ ★

    user_profile
    3 years, 9 months ago
    Mount Si, though I've hiked it a dozen times, always seems to go on and on! I don't like it as much as Little Si, which feels more meandering than the switchbacks of Mount Si. It's not necessarily a hard hike (unless you're not much of a hiker), but it definitely gets your heart rate up and is a great place to train and get stronger during the colder months. The views from the top are great, and I've enjoyed doing this hike after work hours on the weekdays, with headlamps, YakTracks and snowflakes. Beats going during the summer weekends when everyone else is there!
    ★ ★ ★ ★

    user_profile
    3 years, 10 months ago
    A great training hike close to Seattle. You stay in the trees for the majority of the hike, which makes it good for a rainy day.
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    user_profile
    2 months, 1 week ago
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Public Tracks

user_profile
vxtaper 3 years ago
My si new trail
Blistered both heels bad 2 miles in. Big toes and balls of my feet started getting hot spots on the way down.
user_profile
genevieve.pfeiffer11 3 years, 1 month ago
Mount Si Trailhead, King County to 45515 SE Mount Si Rd, Tanner, WA, USA
Forgot to stop Gaia recording after hike. Drove about .5 miles and then remembered to turn it off.
user_profile
katiegeorge21 5 years, 3 months ago
Mount Si Trailhead, King County, WA, USA
Hike with Emilie and arnaud. 2.5 hours up. Half hour lunch
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jrob235 4 years, 4 months ago
Mount Si
1 hr 22 min down 2 hr 20 min up 20 min lunch
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aelizabethdoe 1 year, 12 months ago
Mt. Si (5/17/20, 7:32:53AM)
Hike Chancy- left Seattle at 6:30 am
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