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

⛅ Overcast

Be Prepared
29°
Feels 17°FSummit · 10,358 ft
7:24 AM6:19 PM
FREEZING

Wind

18mph

Precip

1%

Humid

56%

Elev Δ

+4900ft

12-Hour Temp Trend

26°34°

Hourly Forecast

5 PM

⛅

34°

8mph

6 PM

☀️

32°

7mph

7 PM

☀️

29°

6mph

8 PM

☀️

28°

7mph

9 PM

☀️

27°

7mph

10 PM

⛅

27°

5mph

11 PM

⛅

28°

6mph

12 AM

☀️

27°

6mph

1 AM

⛅

26°

9mph

2 AM

⛅

26°

7mph

3 AM

⛅

27°

7mph

4 AM

⛅

27°

8mph

Summit Conditions

56°F→−27°→29°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 4:05:03 PM · America/Los_Angeles

Updated Oct 17, 4:05 PM UTC

More trails in Pacific NW

Mount Rainier — Skyline Trail

7,000 ft · moderate

Enchantments Traverse

7,800 ft · strenuous

Mailbox Peak — New Trail

4,822 ft · strenuous