Geyser Warm Spring
Geyser Warm Spring flows at 82 degrees Fahrenheit within San Juan National Forest's high-elevation terrain at 9,697 feet, requiring a 1.4-kilometer walk through remote alpine country to reach this hidden thermal feature in Colorado's southwestern mountains.
The approach climbs through subalpine forest of spruce and fir to reach water emerging amid high rocky terrain. Cayton Campground nestles along the San Juan Skyway nearby, offering base camp facilities for visitors. The setting represents true high-country experience with limited trail traffic despite excellent trout fishing in Dolores River drainage.
Geyser Warm Spring's name reflects historical perception of its intermittent or pulsing thermal behavior. Water chemistry dominated by sodium at 400 mg/L and calcium at 170 mg/L suggests circulation through limestone-rich geologic horizons at depth. The spring's location within protected forest adds geological and ecological significance.
Trailhead access begins near Cayton Campground along the San Juan Skyway (Highway 145). A 1.4-kilometer walk through forest reaches the spring—suitable for moderate hikers with maps. Best visited mid-June through September when snow clears and trails are passable. Bring water for the return hike.
Is Geyser Warm Spring worth visiting?
Best for
- Warm-water soaking
- Overnight camping trips
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Overview Cayton Campground is located along the San Juan Skyway (Colorado Highway 145) and the Dolores River. Visitors enjoy the area for its great fishing, hiking and scenic driving opportunities.Recreation The Dolores River is a popular fishing destination that can often be crowded on summer weekends. Anglers will find rainbow, brown and cutthroat trout. The area boasts some excellent trails. The Colorado Trail follows the ridge across Bolam Pass. The Lizard Head and Cross Mountain Trails...