Day Hike - Mailbox Peak


Day Hike - Mailbox Peak

Conditioning hike. This hike is steep and relentless. Students can use this as a conditioner.

  • Very Strenuous
  • Challenging
  • Mileage: 6.0 mi
  • Elevation Gain: 4,100 ft

8:00 AM at the Mailbox Peak Parking Lot.  I'm in a Green Subaru with a German Shepherd.  Discover Pass required for parking lot.  If you don't have a pass you can park below the gate.

Take exit 34 from I-90. Head north on 468th Ave SE for approximately half a mile until the intersection with the SE Middle Fork Road. Turn right onto the Middle Fork Road. Follow SE Middle Fork Road 2.2 miles to the stop sign at the junction with SE Dorothy Lake Road. Head left onto SE Middle Fork Road and drive .3 miles. Take the turnoff to the trailhead on the right and continue a short distance to the parking lot.

This is a very difficult hike if you haven't been training regularly.  We will go up at a steady pace with few breaks.  We will linger at the top if the weather is nice.  We will consider going down the new trail.  Heavy snow will cancel and we'll go to the Old Si trail.

This is a dog friendly hike; I bring my German Shepherd.  Other friendly dogs welcome.

Weather permitting, after the hike we may tailgate and tell stories over a few cold ones so bring them if you're so inclined.


Mailbox Peak

  • Green Trails Mount Si NRCA No. 206S

    Green Trails Middle Fork Snoqualmie No. 174S

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

Required Equipment

Trekking poles are very helpful on this terrain.

Microspikes will be needed if we get icy conditions.

The Ten Essentials

  1. Navigation
  2. Sun protection
  3. Insulation (extra clothing)
  4. Illumination
  5. First aid supplies
  6. Fire
  7. Repair kit and tools, including knife
  8. Nutrition (extra food)
  9. Hydration (extra water)
  10. Emergency shelter
Trip Reports