Mailbox Peak


Day Hike - Mailbox Peak

This is a great stand-alone day hike or conditioner. Depending on weather and or trail conditions, we will have a few options to incorporate or divert to as required. Though not part of the "Conditioning Hiking Series", the primary purpose of this trip is conditioning for glacier climbing.

  • Very Strenuous, Snow Scramble, Winter Scramble
  • Challenging
  • Mileage: 11.2 mi
  • Elevation Gain: 4,100 ft
  • Pace: 1.7-2.2 mph

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).

Meet and assemble at main trailhead (past the gate across the road and at the sign at the trailhead) at  6:45 AM.   Brief introductions and trip review and depart by 7:00 AM sharp.

Ascend and descend via the new trail.  Trip open to all branches and eligible members.  This hike  is for developing/improving physical conditioning for glacier climbing.  Recommend  carrying a minimum of 22 lbs. but not more than 32 lbs./20% of  your body weight without submitting prior experience and details with your request to register.  This is not a hike recommended for beginners.  The pace is listed as 1.7-2.2 mph, but we will adjust to trail/snow conditions and a pace that allows conversations.  Should the weather and or trail conditions work against us, we will discuss  and agree to alternatives as a group.  Other than personal bio-breaks, we will stay together as a group within speaking distance of one another.  Our plan would be to spend no more than 15-20 min. at the  summit to take in the views, rest, and enjoy a snack, prior to descending.  This is NOT a snowshoeing trip, so per The Mountaineers standard's, should we run into snow that is beyond mid-calf/below the knee, we will turn around.


Mailbox Peak

  • Green Trails Mount Si NRCA No. 206S

    Green Trails Middle Fork Snoqualmie No. 174SX

    Green Trails Bandera No. 206
  • See full route/place details.
Required Equipment

Required Equipment

The Ten Essentials

  • Navigation
  • Headlamp
  • Sun protection
  • First aid
  • Knife
  • Fire
  • Shelter
  • Extra food
  • Extra water
  • Extra clothes
  • Well broken-in hiking or mountaineering boots
  • Micro-spikes strongly encouraged
  • Trekking poles advised
  • Blister care/treatment
Trip Reports