All Trails

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

⛅ Overcast

Reconsider
24°
Feels 7°FSummit · 10,358 ft
6:18 AM7:54 PM
EXTREME COLDWINDYHYPOTHERMIA RISK

Wind

30mph

Precip

5%

Humid

56%

Elev Δ

+100ft

12-Hour Temp Trend

23°35°

Hourly Forecast

5 AM

⛅

26°

12mph

6 AM

⛅

25°

14mph

7 AM

⛅

23°

14mph

8 AM

⛅

24°

14mph

9 AM

⛅

26°

15mph

10 AM

⛅

28°

18mph

11 AM

⛅

29°

18mph

12 PM

⛅

30°

17mph

1 PM

⛅

33°

14mph

2 PM

⛅

34°

12mph

3 PM

⛅

35°

11mph

4 PM

⛅

34°

13mph

Summit Conditions

25°F→−1°→24°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 4:07:12 AM · America/Los_Angeles

Updated Apr 19, 4:07 AM UTC

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