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blueBlack Mt. Si

  4.4 ( 89 )

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Trail

6.6 mile 10.7 kilometer out and back
46% Runnable
Intermediate/Difficult

Elevation

Ascent: 3,281' 1,000 m
Descent: -3,282' -1,000 m
High: 3,999' 1,219 m
Low: 717' 219 m

Grade

Avg Grade: 19% (11°)
Max Grade: 41% (22°)

Dogs

Leashed
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Trail shared by Benjamin Pontecorvo

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

Benjamin Pontecorvo

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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Check-Ins

Jan 30, 2019
DAVID RAMIREZ
1:17 to top 40min descent
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

Trail Ratings

  4.4 from 89 votes

#29

Overall
  4.4 from 89 votes
5 Star
48%
4 Star
44%
3 Star
4%
2 Star
3%
1 Star
0%
Rankings

#2

in Washington

#29

Overall
255 Views Last Month
11,727 Since Jan 23, 2015
Intermediate/Difficult Intermediate/Difficult

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