Mailbox Peak via the new trail out-and-back

Middle Fork Snoqualmie Natural Resources Conservation Area, Washington

Distance

10 mi

Gain

4,000 ft

Duration

6–9 hrs

High point

4,800 ft

Terrain

trailout and backlong dayvery steepsustained climbseasonal snowpack carry

access — Washington DNR — Middle Fork Snoqualmie NRCA recreation access ↗ (land manager, verified 2026-09-03)
conditions — Washington DNR — South Puget Sound recreation status ↗ (land manager, verified 2026-09-03)
distance — TrekReady out-and-back calculation from Washington DNR's five-mile new Mailbox Peak Trail ↗ (geometry calculation, verified 2026-09-03)
duration — TrekReady estimate from official trail-map distance, gain and trail form ↗ (editorial estimate, verified 2026-09-03)
elevation gain — TrekReady rounded calculation from the Washington DNR trail-map contours ↗ (geometry calculation, verified 2026-09-03)
high point — TrekReady rounded contour value at the official-map turnaround ↗ (geometry calculation, verified 2026-09-03)
terrain — Washington DNR — new hiking trail and steep upper shared route ↗ (official map, verified 2026-09-03)

Reviewed 2026-09-03 from Washington DNR — Middle Fork Snoqualmie NRCA. Check current conditions, closures and permits before you go.