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
35°
Feels 35°FSummit · 4,822 ft
6:11 AM8:00 PM
CLEAR

Wind

0mph

Precip

1%

Humid

51%

Elev Δ

+4000ft

12-Hour Temp Trend

53°70°

Hourly Forecast

5 AM

⛅

53°

6mph

6 AM

⛅

54°

7mph

7 AM

⛅

54°

7mph

8 AM

⛅

56°

6mph

9 AM

⛅

61°

5mph

10 AM

⛅

64°

7mph

11 AM

⛅

66°

11mph

12 PM

⛅

66°

15mph

1 PM

⛅

68°

15mph

2 PM

⛅

68°

13mph

3 PM

⛅

70°

11mph

4 PM

⛅

69°

10mph

Summit Conditions

57°F→−22°→35°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 4:07:11 AM · America/Los_Angeles

Updated Apr 19, 4:07 AM UTC

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