Sulphur Creek Hot Springs
Sulphur Creek Hot Springs flows at 99 degrees Fahrenheit at 2,973 feet elevation in Mount Baker National Forest's remote backcountry near Darrington in Snohomish County. The spring sits 1,729.9 meters from Suiattle River Road under US Forest Service management, requiring a substantial hike through old-growth forest receiving 99.2 inches of precipitation and 440.8 inches of snow annually, where water flows 56 degrees above ambient air temperature.
The spring occupies high-elevation terrain in the western Cascades where massive precipitation builds extraordinary snowpack. At 2,973 feet, the 440.8 inches of annual snowfall creates snowpack depths of 20-plus feet, burying the landscape from November through May. The spring emerges along Sulphur Creek, a tributary of the Suiattle River, in forest dominated by old-growth Douglas fir, western hemlock, and western redcedar. Average annual temperatures of 43 degrees reflect the high-elevation climate, with the spring creating localized thermal microhabitats where warm water meets cold air. The surrounding terrain shows the characteristic Cascade pattern of steep forested slopes, with ridges rising to alpine elevations above the spring.
The 'Sulphur Creek' name references the sulfurous mineral content typical of volcanic hot springs, creating the characteristic smell of hydrogen sulfide. The spring sits in territory historically used by Indigenous peoples, with the remote location suggesting limited Euro-American development beyond primitive bathing pools. The Suiattle River Road provided access to this drainage for timber activities in the 20th century, though the spring's distance from the road kept it relatively undeveloped compared to roadside features.
Access the spring from late June through October when snow melts enough for the 1.7-kilometer hike from Suiattle River Road. The 440-inch snowfall makes winter access impractical for most visitors, with the area buried under deep snow requiring backcountry ski or snowshoe skills. Verify Suiattle River Road conditions, as flood damage has periodically closed sections. The 99-degree water provides comfortable bathing temperatures with less mixing required than hotter springs. Sulphur Creek Campground 1.9 kilometers away offers primitive forest camping as a base for exploring the many trails in the Suiattle drainage.
Is Sulphur Creek Hot Springs worth visiting?
Best for
- Warm-water soaking
- Overnight camping trips
Overview Sulphur Creek Campground is a primitive site in a beautiful forest along the banks of the scenic Suiattle River and Sulpher Creek. It is a remote haven set amongst towering old growth Douglas fir trees in the Mt. Baker-Snoquamie National Forest. Hikers frequently camp here to explore the many trails surrounding the facility. It has moderate, enjoyable summer temperatures throughout the camping season.Recreation The biggest draw to Sulphur Creek Campground is hiking. The well-known...