Page Type Page Type: Mountain/Rock
Location Lat/Lon: 47.49870°N / 121.7562°W
Activities Activities: Hiking, Toprope, Bouldering, Big Wall, Scrambling
Seasons Season: Spring, Summer, Fall, Winter
Additional Information Elevation: 1576 ft / 480 m
Sign the Climber's Log


Little Si fr Rattlesnake Ledges
Great shot by Paul Klenke showing Little Si in proximity to neighboring Mount Si and other mountains.

Little Si
Elevation: 1576 feet

Class 1 (with options for up to 5.12)
It is a paek-a-boo sort of day, avalanche danger is high and you want to get back to watch a great football game. What better place to go than to to Little Si. You can either choose the walk-up YDS Class 1 5 mile roundtrip 1500 elevation gain Little Si trail to the summit or practice some great rockclimbing on one of it's major cliffs.
Rock Climbers on Little Si
Rock Climbers on Little Si

Little Si, a side summit to the west of the much larger Mount Si, is home to good views of the larger Si as well as partial views to the north (Fuller Mtn.) and good views to the south (Rattlesnake Mountain and Cedar Butte). The easiest way to the summit is the YDS Class 1 Little Si trail. This trail begins at the very popular Little Si trailhead (also home to the Old Mount Si trail) and begins heading uphill right away on moderate switchbacks. Good views can be found here of Rattlesnake Ledge, Mount Washington and Cedar Butte. The trail then becomes gradual out and head past the cutoff for both the boulder loop on Mount Si and the Old Mount Si trail (both leaving on the right). The trail stays gradual as it enters the pass between Si and Little Si. About 1.5 miles the trail passes by the first of many rockclimbing area to the left. The trail continues up a moderate grade before turning left to head west than back south to the summit of Little Si.

Little Si 2
Mount Si from the summit of Little Si

Though not a total 360 panorama, there are great views from the many ledges on the Little Si summit. There are also a number of ledges just to the south that you can scramble down for views more to the west. From the ledges off the trail you can clearly see Rattlesnake Mountain, Cedar Butte to the south, Mount Si to the east and have a partial view of Fuller Mountain to the north.

Little Si 2

As mentioned in this page there are plenty of good rockclimbing crags here which are accessible from the Little Si trail. The most famous sections here are World Wall 1 and 2 where good 5.9 and 5.10 climbing can be found. Other areas include A.W.O.L., Blackstone, The Garden and The Woods. Refer to this website for more information.

Getting There

VIA THE LITTLE SI TRAILHEAD: From I-90 get off of Exit 32 and head north on 436th Ave. SE for a half mile. Take a left on North Bend Way and at about a quarter of a mile make a right on the Mount Si road. Head over the bridge (as of 1/4/08 there is construction of a new bridge here) and stay on the road where you will see the Little Si trailhead on your left about 1000 feet from the bridge. It is well marked and hard to miss.

Weather Conditions

This is worst-case senario summit conditions for Little Si.

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This weather is likely what to expect for mountain trailhead conditions.

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Red Tape

New for July 2011: Discovery Pass is now required for this and all Washington State Parks. Here is the link to the site Discovery Pass .


From what I saw camping was prohibited here. Due to the fact that this mountain is so popular and so easy to hike to, I wouldn't even think of camping here.

External Links

For rock climbing information check this rockclimbing website out

Here is another rock climbing page on the area .

For hiking refer to for the latest trip reports of this mountain and many others in the Cascades.



Children refers to the set of objects that logically fall under a given object. For example, the Aconcagua mountain page is a child of the 'Aconcagua Group' and the 'Seven Summits.' The Aconcagua mountain itself has many routes, photos, and trip reports as children.



Parents refers to a larger category under which an object falls. For example, theAconcagua mountain page has the 'Aconcagua Group' and the 'Seven Summits' asparents and is a parent itself to many routes, photos, and Trip Reports.