Mount Washington (Snoqualmie)

A strenuous, eight mile hike with 3,200 ft in elevation gain. Starting in second growth forest, hike up to a road turned trail through an open area to a ridge summit with views of Chester Morse reservoir, Mount Rainier and the peaks on the north side of Snoqualmie Valley. Consider adding Change Peak and/or Greenway Mountain, two lesser known peaks near Mount Washington, to your trip. Hike to just one, any two or all three of them.

getting there

From eastbound I-90, take exit 38, turn right, cross the river, turn right again and park at the Twin Falls/Olallie state park parking lot. There are bathrooms at trailhead.

on the trail

Mount Washington (4,405 ft)

8 miles round trip, 3,200 feet of elevation gain

Hike south then west up the short connector trail to the Iron Horse Trail, then merge onto a wide gravel road (stay right here). The road intersects another road (the Palouse to Cascades State Park Trail formerly John Wayne Pioneer Trail/Iron Horse Trail).  Continue west (right) here and then take the next unmarked trail left (south) about 0.3 miles from the trailhead, marked by a small rock cairn if it's not buried in the snow (skip the light sensor access trail, it's just past that).  This is the start of the Mount Washington Trail.

The trail climbs steeply to the southwest, then eases to a moderate grade with crossings of  several small creeks. It switchbacks through old growth forest with occasional views to the north. Less than a mile from the trailhead, the trail passes under a small cave now used as a climbing wall, with several anchors on the overhang and sometimes people hanging from them!

The trail then veers right at a hand-carved wooden sign that reads “MT WA.” At roughly 1.6 miles from the trailhead, a small clearing noted on small maps as “Owl Hike Spot” provides views of Rattlesnake Ledge to the west. Continue climbing and stay right at the junction with the Great Wall Trail at 2.0 miles, where you will first see the summit. Here the grade moderates, leaving the forest and turning sharply east toward another unmarked trail junction. Again, stay right on the main path west, climbing in long switchbacks.

The route finally breaks out into alpine meadow  at about the three mile mark (flowers here in the early summer). When you reach a sharp switchback, you've reached the boundary between public land and the Cedar River Watershed, the water supply for the city of Seattle.   Curve around a southwest-facing slope and climb north on a gentle ridgeline to the summit of Mount Washington.

Change Peak (4,340 ft)

8 miles, 3,000 feet of elevation gain

From the Great Wall Trail, ascend the southwest ridge.

Greenway Mountain (4,460 ft)

Follow ridgeline logging roads from Change Peak until you can scramble to Greenway Mountain's summit. 

information FOr leaders

Permit information

As of 2017, the Snoqualmie Ranger District considers Mountaineers trips and courses to be "nominal use". Leaders should print and copy this designation letter to show rangers they may see on trail.

  • Suitable Activities: Day Hiking
  • Seasons: June, July, August, September, October, November
  • Weather: View weather forecast
  • Difficulty: Strenuous
  • Length: 8.0 mi
  • Elevation Gain: 3,200 ft
  • 4,405 ft
  • Green Trails Bandera No. 206
  • USGS Chester Morse Lake
  • Green Trails Mount Si NRCA No. 206S

Upcoming Activities

Winter Scramble - Mount Washington (Snoqualmie)

Scrambling Trip
Winter scramble of Mt. Washington and perhaps Change Peak and or Greenway Mountain. It should
Difficulty: Strenuous
Sun, Nov 28, 2021
3 participants 1 leader
Registration closed Nov 26
Kitsap Branch

TAC MAC Conditioner Series - Mount Washington (Snoqualmie)

Youth Field trip: Mountaineers Adventure Club - Tacoma
Training hikes and scrambles to get us into shape!
Difficulty: Strenuous
Wed, Mar 16, 2022
No Prerequisites
7 participants 0 instructors
Registration closes Mar 14
Tacoma Branch

TAC MAC Conditioner Series - Mount Washington (Snoqualmie)

Day Hiking Field trip: Mountaineers Adventure Club - Tacoma
Training hikes and scrambles to get us into shape!
Difficulty: Strenuous
Wed, Feb 1, 2023
No Prerequisites
10 participants 1 instructor
Registration opens Oct 1; Instructor registration open now
Tacoma Branch
Trip Reports

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.

  • Change Peak
  • Greenway Mountain
  • Mount Washington & Change Peak
  • Change Peak & Greenway Mountain
  • Mount Washington & Greenway Mountain
  • Mount Washington, Change Peak & Greenway Mountain

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