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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

Reconsider
26°
Feels 11°FSummit · 10,358 ft
7:27 AM6:16 PM
EXTREME COLDWINDYHYPOTHERMIA RISK

Wind

24mph

Precip

4%

Humid

67%

Elev Δ

+4900ft

12-Hour Temp Trend

23°26°

Hourly Forecast

8 AM

⛅

24°

10mph

9 AM

⛅

26°

9mph

10 AM

⛅

26°

13mph

11 AM

🌨️

23°

13mph

12 PM

🌨️

23°

15mph

1 PM

🌨️

23°

14mph

2 PM

🌨️

23°

16mph

3 PM

🌨️

23°

17mph

4 PM

🌨️

23°

16mph

5 PM

🌨️

25°

9mph

6 PM

⛅

25°

7mph

7 PM

⛅

24°

9mph

Summit Conditions

53°F→−27°→26°F

Dry lapse rate: 5.4°F/1,000ft · 4,908 ft gain

◎L1
Heavyweight merino wool base

250g+ merino top and bottom — your foundation against the cold

◉L2
Insulated grid fleece

Heavy fleece or light synthetic puffy for active insulation

◈L3
Down or synthetic puffy jacketPACK

Pack this — put it on at summit stops and exposed ridgelines

◆L4
Waterproof hardshell jacketPACK

3L waterproof/windproof for summit protection against wind and snow

Summit Pack List

↟Insulated puffy↟Hardshell jacket↟Insulated gloves↟Warm beanie↟Neck gaiter / balaclava↟Hand warmers

Start Cold Tip

Start in your base + fleece. You'll warm up on the switchbacks. Pack your puffy for the summit — standing still in wind at 20°F drops your core temp fast.

Trail Guide

Updated 7:57:48 AM · America/Los_Angeles

Updated Oct 19, 7:57 AM UTC

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