Humpback Mountain Trail

This unofficial route climbs steeply up a ridgeline to a rocky summit with expansive views.
Total Distance: 4.0 miles
Total Ascent: 2700ft
Highest Point: 5176ft
Difficulty: Hard
Our Hiking Time: 3h 35m
Required Permit: None
To get there, take Exit 47 off I-90 and take a right over the bridge. At the intersection, turn right onto Tinkham Road (aka Forest Road 55). Continue on the gravel road for just over a mile to a fork. Veer left onto the Hansen Creek Road (aka Forest Road 5510) and continue one-and-a-half miles, under an old railroad trestle to the first trailhead - marked by large boulders blocking a forest road. From here, you have a choice. You can park at this bend and follow the unmarked road, or you can continue up for another half-mile to a locked gate and another left branching logging road. Both options intersect with the Humpback Mountain trail. Find a space to park and hit the trail. View Google Directions >>
There is no officially maintained trail up Humpback Mountain, but there is a well-worn and easily followed path kept up by a few dedicated volunteers. However, finding the trailhead is the most confusing part of this hike. First, there is more than one way to access the trail. You can take one of two roads off Forest Service Road 5510. Each has its own advantages. The higher road, obviously, cuts out some elevation but takes a mile to intersect with the trail. We took the lower road, which gets you off the logging road and onto the trail in a half-mile. Second, after you decide your approach, there are no helpful signs or rock cairns to guide you to the trailhead, you just need to keep an eye out for tags or a clear indication to turn up the ridge.

Whichever way you choose, the workout begins once you find the trail. Expect a straightforward approach with little in the way of switchbacks. Climb though a young forest of hemlock and fir and into older growth. As you near the top, a few plateaus temper the upward march before the trees thin and talus begins. Navigating the rocks and boulders can be difficult if you allow yourself to get distracted by glimpses of the views that wait at the top. On a good day, the landscape stretches out from Humpback’s rocky summit in every direction. To the north, across I-90 are Granite and Bandera with the distinctive tooth of Kaleetan Peak rising behind. Immediately the east, Silver Peak and Abiel Peak surround Annette Lake and take up most of the skyline. To the south, a vast sea of forest stretches to the base of Rainier. Humpback’s western neighbor, Little St. Helens sits above the Snoqualmie Valley and the interstate leading back toward the city.

Short, intense and rewarding. We enjoyed this hike, though it’s not for everyone. The steep and relentless grade makes it a training hike, but not ideal for a causal walk in the woods. Still, it is a short amount of distance to get views normally reserved for much longer hikes. If the hike is too short for your taste, you can extend the hike down the other side of Humpback to Scout Lake, though we understand the trail down to the lake is something of a scramble. Humpback Mountain is also not as well known as other nearby hikes, so it is also a great alternative on those crowded sunny days.

History

As one might expect, Humpback’s shape – a smoothly curving ridgeline arching up one side of the mountain and down the other – inspired the Mountaineers to christen it “Humpback,” probably in reference to the whale. The mountain sits between two long abandoned railroad stations, Bandera and Rockdale. The old railroad grade still runs along Humpbacks slopes, today carrying hikers and bikers along the Iron Horse Trail.
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