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

☀️ Clear sky

Good to Go
40°
Feels 40°FSummit · 3,900 ft
7:30 AM6:13 PM
CLEAR

Wind

1mph

Precip

0%

Humid

70%

Elev Δ

+3200ft

12-Hour Temp Trend

44°57°

Hourly Forecast

2 PM

⛅

56°

7mph

3 PM

⛅

57°

8mph

4 PM

⛅

57°

7mph

5 PM

⛅

55°

6mph

6 PM

⛅

52°

4mph

7 PM

⛅

50°

4mph

8 PM

⛅

48°

5mph

9 PM

⛅

46°

4mph

10 PM

⛅

45°

4mph

11 PM

⛅

44°

4mph

12 AM

⛅

44°

3mph

1 AM

⛅

44°

3mph

Summit Conditions

49°F→−9°→40°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 1:24:40 PM · America/Los_Angeles

Updated Oct 18, 1:24 PM UTC

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