Chattanooga Hot Spring
Chattanooga Hot Spring emerges at just 49 degrees Fahrenheit at 10,720 feet elevation near Silverton in San Juan County. Located along the famous Million Dollar Highway, this is one of Colorado's coolest and highest-elevation thermal springs.
The spring flows through San Juan National Forest near the legendary Million Dollar Highway, surrounded by dramatic peaks and high-altitude terrain. A 450-foot walk from the road provides access through alpine meadows and sparse vegetation typical of extreme elevation.
Park safely at highway pullouts; walk approximately 450 feet to reach the spring. Summer-only access from mid-July through September allows for practical visits; heavy snow closes the highway seasonally. Check highway conditions before departing, as weather changes rapidly at this elevation.
The spring's cool temperature and alkaline pH suggest circulation through carbonate-rich formations at extreme depth and pressure. The Million Dollar Highway's historical construction created modern access to previously remote mountain terrain, opening the area to public visitation.
The water at Chattanooga Hot Spring is alkaline (pH 8.7) with 126 mg/L total dissolved solids.
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South Mineral Campground, located along South Mineral Creek, is one of the most popular campgrounds in the San Juan National Forest. The campground has 26 sites, all of which are first-come, first-serve. Most campsites are shaded and well-spaced thanks to spruce and fir trees. Some sites are handicapped accessible. Some sites have large parking areas.Services include water, trash pickup, fire grates, picnic tables, and pit toilets. Bear-safe food storage is recommended. No electricity. Bet...
Chattanooga Hot Spring sits at 10,720 feet — well above 10,000 ft where the air holds roughly 30% less oxygen than at sea level. Altitude sickness (headache, nausea, dizziness) is a real risk, especially when combined with the dehydrating effects of hot water. UV exposure is approximately 43% stronger than at sea level. Acclimate for at least 24 hours before soaking, drink extra water, and descend if symptoms worsen.
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Chattanooga Hot Spring is road-accessible, so you can bring more gear. Cold air temperatures make a changing robe or warm layers essential.
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Springs Near Chattanooga Hot Spring
Alkaline Springs (pH ~8.7)
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