Dexter Spring
Dexter Spring flows at a gentle 68 degrees Fahrenheit in Alamosa County's high valley terrain, offering modest thermal character while standing 23 degrees above ambient—a low-intensity geothermal expression typical of Colorado's southern mountains.
The spring requires a short walk of approximately 300 meters from X Road through mountain meadow and aspens at 7,526 feet elevation. Cool mountain air and sparse mineralization characterize this modest seep where water emerges amid scattered conifers and high-elevation grassland in Alamosa County's remote interior.
Dexter Spring's low temperature and minimal mineral content suggest shallow circulation through cool aquifers without deep penetration into hotter geothermal zones. This spring represents Colorado's quieter thermal features, less dramatic than higher-temperature systems yet consistent in its modest geothermal signature.
A short walk of 300 meters from X Road leads to the spring. Water reaches only 68 degrees, making it safely swimmable in small natural pools. Best access occurs in summer and early fall; winter snow and spring snowmelt can render the approach difficult or impassable.
The water at Dexter Spring is slightly alkaline (pH 8.2).