All Trails

South Sister

Pacific NW · 44.103, -121.769

Oregon's third highest peak and the state's most climbed glacier peak. 12 miles round trip with 4,900 ft gain. Non-technical but relentless scree.

StrenuousPacific NW10,358 ftSummitAlpineScrambleSummit viewsGeology

South Sister

☀️ Clear sky

Use Caution
33°
Feels 23°FSummit · 10,358 ft
5:25 AM8:45 PM
BELOW FREEZING

Wind

16mph

Precip

0%

Humid

35%

Elev Δ

+4900ft

12-Hour Temp Trend

25°36°

Hourly Forecast

5 PM

☀️

36°

11mph

6 PM

☀️

35°

10mph

7 PM

☀️

34°

9mph

8 PM

☀️

32°

8mph

9 PM

☀️

30°

7mph

10 PM

☀️

29°

7mph

11 PM

☀️

28°

6mph

12 AM

☀️

27°

6mph

1 AM

☀️

27°

6mph

2 AM

☀️

26°

5mph

3 AM

☀️

25°

6mph

4 AM

☀️

25°

6mph

Summit Conditions

60°F→−27°→33°F

Dry lapse rate: 5.4°F/1,000ft · 4,908 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 4:24:09 PM · America/Los_Angeles

Updated Jun 4, 4:24 PM UTC

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