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King County

Little Si Trail Viewpoint – Mount Si Viewpoint loop from Tanner

Routes

Running trails & routes

United States

Washington

King County

Little Si Trail Viewpoint – Mount Si Viewpoint loop from Tanner

Hard

3.1

(23)

runners

Little Si Trail Viewpoint – Mount Si Viewpoint loop from Tanner

03:11

14.9km

1,150m

Running

Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required. The starting point of the route is right next to a parking lot.

Last updated: February 17, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Mount Si Natural Resources Conservation Area

Waypoints

Start point

Parking

Get Directions

268 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 of the side trails here are access routes for rock climbing.

Tip by

891 m

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.

Tip by

4.32 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 in the way of the view, but some will scramble around to see the view. Be careful, as veering off trail can be unsafe. The best views are close, at the summit!

Tip by

4.59 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 there is a scrambling route to the top there are also legitimate, ropes-required rock climbing routes, and it's very easy to find yourself on the wrong route. Even if you stay on the scrambling route, the consequences of a fall from the Haystack would be life-changing if not deadly — and coming back down a scrambling route like this is often surprisingly more difficult than getting yourself up.

Tip by

14.9 km

End point

Parking

Way Types & Surfaces

Way Types

13.7 km

1.18 km

Surfaces

13.7 km

631 m

542 m

< 100 m

Elevation

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

Weather

Today

Friday 8 May

18°C

9°C

0 %

Additional weather tips

Max wind speed: 12.0 km/h

to get more detailed weather forecasts along your route

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

Mount Si Viewpoint

Base of Haystack Scramble

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