Thompson Lake Trail
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Difficulty Rating:
Thompson Lake Trail is a 11.0mi moderately trafficked out-and-back trail in Middle Fork Snoqualmie Natural Resources Conservation Area that is rated as hard. This trail is demanding in distance and elevation, but it’s a journey that culminates at a wonderful alpine lake tucked into the mountains, with islands of trees seemingly floating in the water. If you’re seeking a bit of a longer trail but want to avoid heavy crowds, this trail could be the perfect pick.
Getting there
The trailhead for Thompson Lake Trail is off FS 56/Middle Fork Road. There is a small road to a parking area at the Granite Creek Trailhead.
About
Backcountry Campground | No |
When to do | May-October |
Pets allowed | Yes - On Leash |
Family friendly | No |
Route Signage | Average |
Crowd Levels | Moderate |
Route Type | Out and back |
Thompson Lake Trail
Elevation Graph
Weather
Thompson Lake Trail Description
Thompson Lake is a serene, pretty lake amidst the mountains accessible on a longer, more demanding trail. If you’re searching for a decent workout without heavy crowds, this trail is a good pick. Keep in mind that you’ll drop a considerable amount of elevation to access the lake, so keep some gas in the tank to get back up onto the trail on your return trip.
The hike begins on the Granite Creek Trail. Much of the hike is on a somewhat narrow, rocky trail that can be a bit overgrown in spots. Where the logging road approaches the trail early on, stay left to stay on your route.
The hike continues, gaining elevation and curving towards Granite Creek. You’ll come to a T-junction where you should stay left. The Granite Creek Connector goes off to the right, and you’ll take the Granite Lakes Trail on the left.
The trail hugs, and then crosses the creek. Where the path forks, stay left again onto Thompson Point Trail. At about 3970ft of elevation, take Thompson Lake Trail straight ahead as the Thompson Point Trail splits off to the left.
Climb, climb, climb, then drop off down towards the lake. The approach trail can be slick when wet, so be careful. You’ll have access to the lakeshore, and the trail continues halfway around the lake on the left if you want a different vantage point.
When you’re ready, retrace your steps, taking on a steep initial ascent before a more manageable descent back to the parking lot.
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