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Mt. Si

 4.4 (82)
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Map Key

6.6 Miles 10.7 Kilometers


46%

Runnable

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 5 days ago
Some Mud 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 run 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 runner 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

Dec 15, 2018
Christof Dreyer
7.5mi
Dec 7, 2018
Christof Dreyer
Trail clear and dry - one or two muddy spots at the bottom and some icy spots at the top, but no risk of losing traction. 7.2mi
Sep 12, 2018
Vikram Sahney
Jul 4, 2018
Vikram Sahney
Mar 15, 2018
Geneva G
Couldn’t walk afterward. 1 full up/down, 2nd halfway up/down. Great training. 9mi
Jun 4, 2017
Brendan Ross
Jun 3, 2017
Neill Harrison
7.1mi
May 5, 2017
Kevin Keepper
Soft trail with a fun scramble at the end if you complete the summit on Haystack. Be mindful of roots on the descent. 8.4mi

Trail Ratings

  4.4 from 82 votes

#29

Overall
  4.4 from 82 votes
5 Star
48%
4 Star
45%
3 Star
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2 Star
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1 Star
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Rankings

#2

in Washington

#29

Overall
405 Views Last Month
10,810 Since Jan 23, 2015
Intermediate/Difficult Intermediate/Difficult

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