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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
28°
Feels 14°FSummit · 10,358 ft
6:28 AM7:46 PM
EXTREME COLDWINDYHYPOTHERMIA RISK

Wind

21mph

Precip

0%

Humid

28%

Elev Δ

+4900ft

12-Hour Temp Trend

38°47°

Hourly Forecast

10 AM

☀️

38°

5mph

11 AM

☀️

41°

6mph

12 PM

☀️

43°

7mph

1 PM

☀️

45°

7mph

2 PM

☀️

46°

7mph

3 PM

☀️

47°

7mph

4 PM

⛅

47°

6mph

5 PM

⛅

46°

4mph

6 PM

☀️

45°

5mph

7 PM

⛅

43°

9mph

8 PM

☀️

40°

10mph

9 PM

⛅

39°

6mph

Summit Conditions

54°F→−26°→28°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 9:47:38 AM · America/Los_Angeles

Updated Aug 30, 9:47 AM UTC

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