Colorado has at least 52 documented hot springs, among the most of any state in this directory, spread across the Rockies and the San Juan range. 13 are free wild soaks and 39 are paid resorts or managed pools. The Springs Resort and Spa in Pagosa Springs and Glenwood Hot Springs Pool anchor the developed end, one built around a famously deep geothermal source, the other home to one of the largest mineral pools in the country.
The Arkansas River valley around Buena Vista and Salida holds the densest grouping, with resorts and pools like Mount Princeton Hot Springs Resort, Cottonwood Hot Springs, and Salida Hot Springs Aquatic Center set against the Collegiate Peaks.
Pagosa Springs in the south centers on a deep geothermal source, feeding resorts such as The Springs Resort and Spa alongside free riverside soaks like Piedra River Hot Springs. The San Juan mountains add historic soaks around Ouray, including Orvis Hot Springs and the Ouray Hot Springs Pool.
Glenwood Springs on the Interstate 70 corridor holds the largest developed pools, led by Glenwood Hot Springs Pool and Iron Mountain Hot Springs, while Steamboat Springs and Idaho Springs add northern and Front Range access points.
Colorado pairs big developed mineral pools with high-country wild soaks in a way few states match, all at Rocky Mountain elevation. The same trip can include a 1,000,000-gallon pool in Glenwood Springs, a deep geothermal resort in Pagosa Springs, and a free riverside soak reached by a mountain trail. Elevations above 7,000 feet keep summers mild and make winter soaking under snow a signature Colorado experience, with many resorts open year-round.
Highlights are drawn from the hot springs documented in this directory. Others may exist in Colorado's remote mountain backcountry.
Deepest geothermal source: The Springs Resort and Spa in Pagosa Springs draws from a geothermal aquifer measured among the deepest documented in our records, feeding more than 20 terraced pools above the San Juan River.
Largest developed mineral pool: Glenwood Hot Springs Pool holds one of the largest hot springs pools in the country, a block-long mineral pool on the Interstate 70 corridor open year-round in Glenwood Springs.
Collegiate Peaks resort: Mount Princeton Hot Springs Resort sits beneath 14,000-foot peaks near Buena Vista, with creekside rock pools and a large bathhouse in the Arkansas River valley.
Clothing-optional San Juan soak: Orvis Hot Springs near Ouray offers a clothing-optional set of outdoor ponds and rock pools with direct views of the San Juan mountains.
Free riverside wild soak: Piedra River Hot Springs near Pagosa Springs is a free primitive pool reached by a forest hike to the Piedra River, with no facilities on site.
Walk-in vapor caves: Yampah Hot Springs and Vapor Caves in Glenwood Springs offers natural geothermal steam caves, a rare documented walk-in vapor cave soak in the state.
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