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Mount Whitney — Main Trail

Highest peak in the contiguous US. 22 miles round trip with 6,100 ft gain. 97 switchbacks. Altitude sickness common above 12,000 ft. Permit required.

StrenuousWest14,505 ftOpen Summit

Mount Whitney — Main Trail

⛅ Overcast

Reconsider
9°
Feels -11°FSummit · 14,505 ft
6:14 AM7:29 PM
EXTREME COLDWINDYHYPOTHERMIA RISK

Wind

23mph

Precip

0%

Humid

10%

Elev Δ

+200ft

12-Hour Temp Trend

7°22°

Hourly Forecast

7 AM

⛅

7°

12mph

8 AM

⛅

8°

12mph

9 AM

⛅

9°

12mph

10 AM

⛅

10°

9mph

11 AM

⛅

14°

13mph

12 PM

⛅

20°

17mph

1 PM

⛅

22°

19mph

2 PM

☀️

22°

20mph

3 PM

⛅

22°

21mph

4 PM

⛅

21°

20mph

5 PM

⛅

19°

18mph

6 PM

⛅

17°

16mph

Summit Conditions

10°F→−1°→9°F

Dry lapse rate: 5.4°F/1,000ft · 217 ft gain

◎L1
Expedition-weight merino base

320g+ merino top and bottom — maximum warmth next to skin

◉L2
Heavy fleece + light puffy

Double mid-layer system for extreme insulation

◈L3
Expedition down parka

Heavy fill-power down or synthetic expedition jacket

◆L4
Hardshell jacket + pants

Full hardshell system — top and bottom protection mandatory

Summit Pack List

↟Expedition mittens↟Balaclava↟Ski goggles↟Chemical warmers (hands + toes)↟Emergency bivy↟Thermos with hot drink

Start Cold Tip

At these temperatures, DO NOT start cold. Wear full layers from the trailhead. Exposed skin risks frostbite in minutes. Turn back if conditions deteriorate.

Updated 6:46:04 AM · America/Los_Angeles

Updated Apr 19, 6:46 AM UTC

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