All Trails

Mount Si

North Bend, WA · 47.488, -121.724

The most hiked trail in Washington state. 8 miles round trip with 3,150 ft gain through old-growth forest. Optional Class 3 haystack scramble at top.

ModeratePacific NW3,900 ftForestScrambleSummitSummit views

Mount Si

⛅ Overcast

Good to Go
47°
Feels 47°FSummit · 3,900 ft
7:31 AM6:11 PM
CLEAR

Wind

1mph

Precip

3%

Humid

80%

Elev Δ

+3200ft

12-Hour Temp Trend

50°60°

Hourly Forecast

8 AM

⛅

50°

2mph

9 AM

⛅

50°

3mph

10 AM

⛅

54°

3mph

11 AM

⛅

57°

1mph

12 PM

⛅

58°

1mph

1 PM

⛅

59°

3mph

2 PM

⛅

60°

6mph

3 PM

⛅

59°

6mph

4 PM

⛅

59°

6mph

5 PM

⛅

58°

6mph

6 PM

⛅

54°

5mph

7 PM

⛅

53°

4mph

Summit Conditions

55°F→−8°→47°F

Wet lapse rate: 2.7°F/1,000ft · 3,150 ft gain

◎L1
Merino wool 200g base layer

Medium-weight merino regulates temp and resists odor on long days

◉L2
Grid fleece jacket

Stretchy grid fleece balances warmth and breathability on climbs

◈L3
Wind shell jacketPACK

Blocks summit wind without trapping sweat on the approach

Summit Pack List

↟Wind shell↟Light puffy (optional)↟Beanie↟Light gloves

Start Cold Tip

Start in your base + fleece. You'll warm up on the switchbacks. Pack your wind shell for the exposed ridge — wind hits different above treeline.

Trail Guide

Updated 7:55:45 AM · America/Los_Angeles

Updated Oct 19, 7:55 AM UTC

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