De Maris Springs
De Maris Springs emerges at 97 degrees Fahrenheit along the North Fork of the Shoshone River at 4,934 feet elevation, where USGS measurements recorded neutral pH and total dissolved solids reaching 1,400 milligrams per liter. This roadside thermal feature sits within the historic Colter's Hell area, heating water 54 degrees above the site's 43-degree annual average temperature in Park County near Cody.
The spring flows in the Shoshone River canyon where the stream exits the Absaroka Range, with steep canyon walls rising above the thermal area. At 4,934 feet elevation, the site receives 16.5 inches of precipitation and 49 inches of snow annually, significantly less than high-elevation Yellowstone locations. The surrounding terrain mixes sagebrush steppe with riparian vegetation along the river corridor, with the canyon providing dramatic rock formations and exposed geology.
Roadside access from the North Fork Highway makes this an easily visited thermal area when traveling between Cody and Yellowstone's east entrance. The 60-meter distance from pavement requires minimal walking. Visit year-round, though winter can bring snow and ice to the immediate area. Hogan and Luce Campground, 32.6 kilometers away, offers first-come camping with reservoir access. Combine with visits to nearby Buffalo Bill Reservoir and dam.
De Maris Springs sits within Colter's Hell, named for mountain man John Colter who traversed the region during winter 1807-1808 and reported encountering fumaroles and hot springs. The thermal area has declined since Colter's time, with modern spring temperatures and activity substantially reduced compared to historical accounts. The specific naming and development history of this spring remain poorly documented in accessible records.
The water at De Maris Springs is neutral (pH 7.0) with 1400 mg/L total dissolved solids. It is notably rich in calcium (may support bone density and joint health), magnesium (known for muscle relaxation and stress relief), and sulfate (traditionally used for skin conditions and inflammation).
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The Hogan and Luce Campground has five individual camp sites and one group site. It is located near two reservoirs. The campground next to the Hogan Reservoir has picnic tables, toilet facilities, bear-proof food storage boxes, grills/fire rings, horse trailer parking, horse stanchions, a boat ramp and hitching rails.
De Maris Springs is road-accessible, so you can bring more gear. Cold air temperatures make a changing robe or warm layers essential.
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