All Trails

Mailbox Peak — New Trail

Seattle's favorite sufferfest. 9.4 miles round trip with 4,000 ft gain. The old trail gains that in just 2.5 miles. Mailbox at the summit.

StrenuousPacific NW4,822 ftForested

Mailbox Peak — New Trail

⛅ Overcast

Good to Go
33°
Feels 33°FSummit · 4,822 ft
6:11 AM8:00 PM
CLEAR

Wind

2mph

Precip

1%

Humid

40%

Elev Δ

+4000ft

12-Hour Temp Trend

54°70°

Hourly Forecast

7 AM

⛅

54°

7mph

8 AM

⛅

55°

6mph

9 AM

⛅

60°

5mph

10 AM

⛅

64°

7mph

11 AM

⛅

66°

9mph

12 PM

⛅

68°

11mph

1 PM

⛅

68°

13mph

2 PM

⛅

69°

14mph

3 PM

⛅

70°

11mph

4 PM

⛅

70°

8mph

5 PM

⛅

70°

5mph

6 PM

⛅

69°

3mph

Summit Conditions

54°F→−21°→33°F

Dry lapse rate: 5.4°F/1,000ft · 3,976 ft gain

◎L1
Merino wool 200g base layer

Medium-weight merino regulates temp and resists odor on long days

◉L2
Grid fleece jacket

Stretchy grid fleece balances warmth and breathability on climbs

◈L3
Wind shell jacketPACK

Blocks summit wind without trapping sweat on the approach

Summit Pack List

↟Wind shell↟Light puffy (optional)↟Beanie↟Light gloves

Start Cold Tip

Start in your base + fleece. You'll warm up on the switchbacks. Pack your wind shell for the exposed ridge — wind hits different above treeline.

Updated 6:46:16 AM · America/Los_Angeles

Updated Apr 19, 6:46 AM UTC

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