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Washington

King County

Little Si Trail Viewpoint – Mount Si Viewpoint loop from Tanner

Routes

Hiking trails & Routes

United States

Washington

King County

Little Si Trail Viewpoint – Mount Si Viewpoint loop from Tanner

Hard

4.9

(1181)

16,288

hikers

Little Si Trail Viewpoint – Mount Si Viewpoint loop from Tanner

08:38

21.5km

1,070m

Hiking

Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required. The starting point of the route is accessible with public transport.

Last updated: April 20, 2026

Tips

Temporary access restrictions

Includes segments with temporary access restrictions.

After 17.7 km for 55 m

Customers only

Waypoints

Start point

Bus stop

Get Directions

545 m

Little Si Trail Viewpoint

Highlight • Viewpoint

This viewpoint comes up very quickly, offering a preview of what you'll see as you continue climbing up the trail. Take care that you don't literally go "climbing," as some …

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1.17 km

Boulder Garden Loop Trail

Highlight (Segment) • Trail

The Boulder Garden Trail takes you through just what the name describes: A series of massive stone boulders popping out of the lush greenery, almost as if they'd been planted there.

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7.17 km

Base of Haystack Scramble

Highlight • Climb

Many hikers turn around at the boulder field further down Mount Si, wisely avoiding the scramble up the forbidding Haystack Rock in front of you. That's for good reason: Although …

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7.44 km

Mount Si Viewpoint

Highlight • Viewpoint

About 0.24 mile below the summit of Mount Si, this viewpoint on the Mt. Si Trail offers sweeping views of the Snoqualmie Valley through the trees. There are some boulders …

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21.5 km

End point

Bus stop

Way Types & Surfaces

Way Types

12.1 km

4.71 km

3.19 km

1.11 km

400 m

Surfaces

13.1 km

5.58 km

1.50 km

1.10 km

197 m

< 100 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (1,190 m)

Lowest point (130 m)

Weather

Today

Thursday 28 May

27°C

12°C

0 %

Additional weather tips

Max wind speed: 9.0 km/h

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Little Si Trail Viewpoint – Mount Si Viewpoint loop from Tanner

Little Si Trail Viewpoint

Boulder Garden Loop Trail

Base of Haystack Scramble

Mount Si Viewpoint

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