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Mount Si

A popular climb to gorgeous views from the summit of Mount Si.

Hiking Severe

13 km
1.1 km
1.1 km
4-5 hrs
Low Point
205 m
High Point
1.3 km
Mount Si Map

The climb to the summit of Mount Si is ultra-popular with local hikers, but that doesn’t make it easy! The 8-mile round-trip hike requires 3,500 feet of vertical gain up a strenuous trail. But that doesn’t keep the crowds away: according to local guidebook author Craig Romano, Mount Si attracts over 100,000 hikers per year! (Source)


According to Paul Kriloff of WTA.org, the hike "falls in a kind of sweet spot for experienced and novice hikers alike: enough of a test for bragging rights, not so tough as to scare people away,” which only contributes to its popularity. In the spring, climbers use Mount Si as a training ground while they prepare to tackle Mount Rainier later in the year.

The trail begins ascending almost immediately, switchbacking up the steep mountainside beneath an immense forest canopy. The first views arrive in three and a half miles, with a break in the trees… but there’s still more climbing to gain the true summit.

The summit provides "an overlook of the Snoqualmie Valley, Seattle, and the Olympics,” according to Kriloff. "You can also gaze up at the Haystack, Mount Si’s true summit, as well as the lower western summit,” he continues.

If you haven’t had enough challenge just yet, an off-trail scramble from the summit of Mount Si heads to the top of the Haystack. Exercise caution if you decide to go off-trail.

For everyone else, it’s time to turn around and re-trace your steps back to the car.

Sources: https://www.outsideonline.com/2404959/6-great-hikes-do-seattle?utmmedium=social&utmcampaign=facebookpost&utmsource=facebook&fbclid=IwAR3NzIYN2k2hnkMxtCF9EPivC1csoFrDaUf7T0z6QFh2i9sACE1SJVaIyy4#close https://www.wta.org/go-hiking/hikes/mount-si



Hiking challenging trails where simple scrambling, with the occasional use of the hands, is a distinct possibility. The trails are often filled with all manner of obstacles both small and large, and the hills are very steep. Obstacles and challenges are often unexpected and can be unpredictable.

Medium Exposure

2 out of 4

The trail contains some obstacles such as outcroppings and rock which could cause injury.


2 out of 4

Away from help but easily accessed.

Best time to visit

all year round


  • Picturesque
  • Summit Hike
  • Forestry or heavy vegetation

Similar routes nearby

Guidebooks in this area