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Mount Si - Old Trail

Arrive at Little Si trail head and start climbing until about elevation of 780 feet where you will see a signpost for "Boulder Garden Loop trail." Continue on the Little Si trail until the next junction with the Boulder Garden Loop and veer right. Continue on the trail as it starts to gain elevation quickly. Massive moss-covered boulders litter the landscape as you hike this portion of the trail. At about 1400 feet you arrive at the junction for Old Si trail. The Old Si trail is not named, but there is a sign post to continue on the Boulder Garden Loop trail.

Keep left to continue on Old Si trail. Douglas fir, Western Hemlock, and alder are the dominant trees as you start. The trail is narrower and steeper than the new trail, and it has fewer switchbacks. After 1.7 miles, keep left again at the second junction to stay on the Old Si trail. As you gain elevation, noble fir trees mix in with the Hemlocks and Douglas firs. After 0.5 miles, the new and old trails finally merge--pay attention to this spot, as you don't want to miss it during your descent. The consequence is to return to wrong parking lot. Continue on new trail 0.2 miles to the top, where you can enjoy expansive panoramas of Puget Sound and the Olympics on a clear day.
Driving Directions:

Take exit 32 on I-90 East for 436th Ave Se. Turn left onto 436th Ave SE, drive 0.6 mi. Turn left onto SE North Bend Way, drive 0.3 mi. Take the 1st right onto SE Mount Si Rd, drive 0.4 mi. Look for overflow parking lot on your left and main parking lot near by with sign "Little Si".

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Recent Trip Reports

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There are 76 trip reports for this hike. See all trip reports for this hike.
Mount Si - Old Trail — Apr 14, 2014 — Janice Van Cleve
Day hike
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As previous reports stated, the trail is dry and clear all the way to the summit. No blowdowns, mud...
As previous reports stated, the trail is dry and clear all the way to the summit. No blowdowns, mud, or snow. The ice patch reported by Kalman Brauner melted out today with only a little ice left well coated in dirt for good traction.

The old trail up Mount Si is indeed steep and my legs are not convinced that it is shorter than the regular trail. I took the boulder loop trail up the old road both up to the trailhead and back down. The old Mt. Si trail starts along the high point of the loop at an unmarked set of rock steps. From there it ascends a long rocky climb to a small level patch and then up the devil's staircase. This section is steep, rugged, and nasty. It ends at an old abandoned road well blocked off to guide hikers on the second leg of this trail.

From the abandoned road the trail zig zags through 24 switchbacks (not counting turns) to the place where it almost touches the regular trail. Between switchback #8 and switchback #13, the trail is badly sloughed in many parts. Also there are several places in this section where people have cut switchbacks, threatening trail erosion.

When the old trail finally emerges from the woods and almost joins the regular trail, it turns left and climbs steadily and steeply right up the spine of the ridge perhaps another 200 ft gain before at last joining the regular trail. From there to the Haystack it is bone dry and clear. A few small patches of snow remain in some hollows but they will disappear soon.

Lots of people on both the old and the regular trails today and many dogs - some without leashes. A couple of guys climbed the Haystack but did not see any goats.
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Mount Si - Old Trail — Apr 13, 2014 — Kalman Brauner
Day hike
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Trail: great condition; the only minor annoyance was about ten feet of ice at the very top - close t...
Trail: great condition; the only minor annoyance was about ten feet of ice at the very top - close to the junction between of the spur that goes to the Snoqualmie Valley Overlook and the spur that goes toward scramble route to the top of the haystack.

Equipment: poles were used though not needed; traction devices were not used or needed.

Weather: fantastic - in particular, warm.

Visibility: great views in all directions: Rainier, Olympics, Cascades, Puget Sound, etc.

Time: car to Snoqualmie Valley Overview - 2:15 hr; Snoqualmie Valley Overlook to car - 1:50 hr.

Companions: none :-(
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Mount Si - Old Trail — Apr 12, 2014 — Old Rod
Day hike
Features: Wildflowers blooming
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Our first time up Mount Si via the old trail. This trail is shorter in distance but is much steeper...
Our first time up Mount Si via the old trail. This trail is shorter in distance but is much steeper and took us longer. Even though, we liked the new scenery and hike.

Hike starts at the Little Mt Si Trial head, and heads up the Boulder Loop Trail. We took the second leg of this trail going up and the first leg coming back down. On the return trip we also found an old road (North Road), which is on my Every Trail App, and turns out to be a pretty nice trail. By using a map on GPS we had no trouble following this trail back to the Boulder Loop, cutting out the very steep portions of the hike and giving another variety.

The trail is clear of mud, snow and water.

The spring foliage is now starting and some wild flowers are starting to bloom.
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Mount Si - Old Trail — Apr 09, 2014 — Jeno
Day hike
Features: Wildflowers blooming
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Second trip this week up Mt. Si via the Old trail – Monday was a beautiful day, so I had to take a...
Second trip this week up Mt. Si via the Old trail – Monday was a beautiful day, so I had to take advantage of that! Today’s hike was a bit gloomier, but not bad otherwise. Started up the trail at a little after 6:30 AM. Only saw one other hiker who was heading down after I cut over to the regular trail and one hiker who was heading up as I was on the decent back on the old trail. The old trail is a bit mushy in places, but the regular trail is excellent the last ¾ miles. There was a very slight dusting of snow at the top but it only accumulated on the rocks and vegetation. I had a hungry Gray Jay waiting for a breakfast handout, but unfortunately I had no snacks for him. There was a low cloud cover and there were no views – not even the Haystack was visible from the basin area. The valley below was also cloud filled today so no views out even to North Bend. Back at the car by 10 o’clock. Quite a contrast from Monday’s trip, as there were only about 6 or 7 cars in the Little Si lot. By the time I got back there on Monday morning the lot was totally full with the exception of one or two spots. No wildlife sightings today. A couple of nice red flowering currants on the Little Si trail and also on the Boulder Garden loop trail should keep the hummingbirds happy!
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Mount Si - Old Trail — Mar 21, 2014 — Kalman Brauner
Day hike
Issues: Snow on trail
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Trail: snow (little ice) on trail for final 1500 ft. Equipment: poles OR traction devices were us...
Trail: snow (little ice) on trail for final 1500 ft.

Equipment: poles OR traction devices were used for final 1500 ft or so; the use of both is probably desirable.

Weather: a bit chilly in forest, otherwise very good; sunny; visibility blocked in the far distance: could see Seattle and Puget Sound, but not Rainier and Olympics.

Time: car to Snoqualmie Valley Overview - 3:15; Snoqualmie Valley Overview to car - 2:15.

Companions: Rachel & Amy.
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mount si_daniel.jpg
The panorama from the summit of Mount Si. Photo by Daniel.
Location
Snoqualmie Pass -- North Bend Area
Department of Natural Resources
Statistics
Roundtrip 7.4 miles
Elevation Gain 3420 ft
Highest Point 3980 ft
Features
Waterfalls
Old growth
Fall foliage
Wildflowers/Meadows
Mountain views
Summits
Wildlife
User info
Dogs allowed on leash
Discover Pass required

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Red MarkerMount Si - Old Trail
47.440837 -121.6253065
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