Mailbox Peak

A strenuous day hike with 4,100 feet of elevation gain. The original path heads straight up the ridge through the forest to the rocky summit for a 6-miles round trip. The new trail switchbacks to the summit for 11.2 miles round trip.

getting there

Take Exit 34 off of I-90 and drive north on 468th Ave SE for ~0.5 mile. Turn right onto SE Middle Fork Road, continue for 2.5 miles, turn right and drive ~200 yards to the Mailbox Peak trailhead (900 ft).

PUBLIC TRANSPORTATION - TRAILHEAD DIRECT

On weekends and designated holidays, Trailhead Direct takes riders to three hiking destinations: Mount Si, Issaquah Alps, and Mailbox Peak. All buses are run by King County and regular fares apply, just like in the city. By establishing this service, Trailhead Direct aims to increase accessibility to local trails, limit vehicle congestion in trailhead parking lots, and reduce carbon emissions. If you will have a group of more than 10 people, please fill out this form to reserve seating.

on the trail

trail

11.2 miles round trip with 4,100 feet of elevation gain

In response to a continued increase in usage, the Mountains to Sound Greenway and the Washington State Department of Natural Resources opened a new, more sustainable trail up Mailbox Peak in the Middle Fork Snoqualmie River Valley in 2014. This new 5-mile trail has offered increased access to this already popular area. Volunteers play a crucial role in keeping this already well-loved trail maintained.

boothpath

6 miles round trip with 4,100 feet of elevation gain

The original route up Mailbox Peak heads straight up the ridge through the forest to the rocky summit.

dirtybox peak (4,926 ft)

8.5 miles with 4,570 feet of elevation gain

Dirtybox Peak lies on the ridge between Mailbox Peak and Dirty Harry's Peak.  Follow the old Mailbox Peak path to the summit of Mailbox Peak, then continue down and across the Southeast Ridge to Dirtybox Peak.  

INFORMATION FOR LEADERS

  • Permits are required in this area for all fee-based (course-related) activities, regardless of group size, and all free activities involving 13 or more people. Leaders may list trips at this route/place with the understanding that they need to verify that a permit has been obtained before running the trip (if required as outlined above). Permit applications are submitted to WA Department of Natural Resources annually in December. Please contact Amanda Virbitsky at amandav@mountaineers.org with any additional questions.
  • Difficulty: Very Strenuous, Snow Scramble, Winter Scramble
  • Length: 11.2 mi
  • Elevation Gain: 4,100 ft
  • 4,841 ft
  • Land Manager: Middle Fork NRCA
  • Parking Permit Required: Discover Pass
  • Recommended Party Size: 12
  • Maximum Party Size: 20
  • Maximum Route/Place Capacity: 20
Map
  • Green Trails Mount Si NRCA No. 206S
  • Green Trails Middle Fork Snoqualmie No. 174S
  • Green Trails Bandera No. 206
Activities

Upcoming Activities



Seattle SIG Practices and Conditioners - Mailbox Peak

Climbing Field trip: Basic Alpine Climbing Course
SIG Skills Conditioner - Training for Successful Approaches
Difficulty: Very Strenuous, Snow Scramble, Winter Scramble
Sat, Feb 22, 2020
No Prerequisites, Leader's Permission Required
8 participants 3 instructors on waitlist
Registration closes Feb 20
Seattle Branch

Franklin Pierce HS - Hiking - Mailbox Peak

Youth Youth activity: Mountain Workshop - Franklin Pierce HS
A Hiking adventure for Franklin Pierce HS students!
Difficulty: Very Strenuous, Snow Scramble, Winter Scramble
Sat, Feb 29, 2020
No Prerequisites
0 participants 1 instructor
Registration closes Feb 27
Tacoma Branch

Seattle SIG Practices and Conditioners - Mailbox Peak

Climbing Field trip: Basic Alpine Climbing Course
Conditioner hike for Stoury/Arnold SIG. This is for Stoury/Arnold SIG members only. If you sign
Difficulty: Very Strenuous, Snow Scramble, Winter Scramble
Sun, Mar 1, 2020
No Prerequisites, Leader's Permission Required
3 participants 0 instructors
Registration closes Feb 28
Seattle Branch

Day Hike - Mailbox Peak

Day Hiking Trip
Up the old trail and down the old trail for old times' sake...
Difficulty: Very Strenuous, Snow Scramble, Winter Scramble
Sat, Mar 7, 2020
No Prerequisites, Leader's Permission Required
1 participant on waitlist 0 leaders
Registration closes Mar 5
Tacoma Branch

Alpine Scramble - Mailbox Peak

Scrambling Trip
PRIORITY TO OLYMPIA BRANCH SCRAMBLING AND BASIC CLIMBING STUDENTS UNTIL MARCH 9. Conditioner to satisfy
Difficulty: Very Strenuous, Snow Scramble, Winter Scramble
Mon, Mar 16, 2020
Prerequisites, Leader's Permission Required
0 participants 0 leaders
Registration closes Mar 14
Olympia Branch

Seattle SIG Practices and Conditioners - Mailbox Peak

Climbing Field trip: Basic Alpine Climbing Course
SIG Skills Conditioner - Snow Travel
Difficulty: Very Strenuous, Snow Scramble, Winter Scramble
Sat, Apr 4, 2020
No Prerequisites, Leader's Permission Required
7 participants 2 instructors on waitlist
Registration closes Apr 2
Seattle Branch

Seattle SIG Practices and Conditioners - Mailbox Peak

Climbing Field trip: Basic Alpine Climbing Course
SIG conditioner and timed evaluation for Daniel Weaver's SIG
Difficulty: Very Strenuous, Snow Scramble, Winter Scramble
Sat, Apr 11, 2020
No Prerequisites
4 participants 1 instructor
Registration closes Apr 9
Seattle Branch

Seattle SIG Practices and Conditioners - Mailbox Peak

Climbing Field trip: Basic Alpine Climbing Course
SIG Skills Conditioner - Training for Successful Approaches
Difficulty: Very Strenuous
Sun, Apr 26, 2020
No Prerequisites, Leader's Permission Required
6 participants 1 instructor on waitlist
Registration closes Apr 24
Seattle Branch

Seattle SIG Practices and Conditioners - Mailbox Peak

Climbing Field trip: Basic Alpine Climbing Course
SIG Skills Conditioner - Hike (@Mailbox) & Climb (@Vertical World)
Difficulty: Very Strenuous, Snow Scramble, Winter Scramble
Sat, May 16, 2020
No Prerequisites, Leader's Permission Required
7 participants 0 instructors
Registration closes May 14
Seattle Branch
Trip Reports
Titles

This is a list of titles that represent the variations of trips you can take at this route/place. This includes side trips, extensions and peak combinations. Not seeing a title that fits your trip? Log in and send us updates, images, or resources.

  • Dirtybox Peak
  • Mailbox & Dirtybox Peaks
Resources

There are no resources for this route/place. Log in and send us updates, images, or resources.

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