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Mt. Si

 4.4 (77)

Length


6.6 Miles 10.7 Kilometers


3,281' 1,000 m

Ascent

-3,282' -1,000 m

Descent

19%

Avg Grade (11°)

41%

Max Grade (22°)

3,999' 1,219 m

High

717' 219 m

Low

Conditions


All Clear 1 day ago
Dry History

Getting forecast...

A steep, well-maintained trail takes you atop Mt. Si with outrageous views of Puget Sound.

Benjamin Pontecorvo

Dogs Leashed

Features Birding · Fall Colors · River/Creek · Views · Wildlife

Discovery Pass required year round.

Overview

This is a classic, well-traveled hike leading to the top of Mt. Si. There is a small portion of scrambling at the summit that is optional.

Description

From the trailhead, follow the well marked "Mt. Si Trailhead" or just follow the throngs of people on this deservedly popular trail. The endless switchbacks and steep terrain begin almost immediately, and will continue until the very top. This trail offers intermediate terrain that can be useful for both the novice hiker and a more experienced outdoors person training for a bigger objective. You'll gain more than 3000 vertical feet in under four miles of beautiful old growth forest. The canopy finally breaks close to the top, revealing some views to the South.

Once out of the forest, there are many outcroppings to enjoy your lunch and some views. Most people will stop here- but the more adventurous can continue uphill and right on a stony path to the Haystack, Mt. Si's true summit. This extra 150 ft of scrambling is class 3/4 and is well worth is as the views to the North are revealed.

On your way down please do not cut trails. What saves you 30 seconds can cause decades of damage. Also you'll need a discovery pass to park at the lot. Have fun!

Flora & Fauna

You will walk over three miles through old growth forest.

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Your Check-Ins

Check-Ins

Oct 22, 2018
Bethany V
9.6mi
Sep 29, 2018
Michael Oliver
Sep 14, 2018
E Murray
Sep 4, 2018
Isaac Bozeman
Sep 3, 2018
Delia B
Aug 31, 2018
Andrew Davis
Aug 27, 2018
ajmags263 Mags
Great hike up and easy descent! 6.6mi
Aug 26, 2018
Joe Meiners

Trail Ratings

  4.4 from 76 votes

#29

Overall
  4.4 from 76 votes
5 Star
49%
4 Star
45%
3 Star
5%
2 Star
1%
1 Star
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Rankings

#2

in Washington

#29

Overall
608 Views Last Month
9,536 Since Jan 23, 2015
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