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South Sister

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 ftOpen Summit

South Sister

⛅ Mainly clear

Reconsider
25°
Feels 10°FSummit · 10,358 ft
6:18 AM7:54 PM
EXTREME COLDWINDYHYPOTHERMIA RISK

Wind

26mph

Precip

3%

Humid

33%

Elev Δ

+100ft

12-Hour Temp Trend

23°35°

Hourly Forecast

7 AM

⛅

23°

14mph

8 AM

⛅

24°

15mph

9 AM

⛅

27°

17mph

10 AM

⛅

28°

19mph

11 AM

⛅

29°

18mph

12 PM

⛅

31°

17mph

1 PM

⛅

32°

16mph

2 PM

⛅

34°

10mph

3 PM

☀️

35°

10mph

4 PM

⛅

34°

11mph

5 PM

⛅

33°

6mph

6 PM

⛅

31°

6mph

Summit Conditions

26°F→−1°→25°F

Dry lapse rate: 5.4°F/1,000ft · 86 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.

Updated 6:50:15 AM · America/Los_Angeles

Updated Apr 19, 6:50 AM UTC

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