The Hermosa Creek watershed encompasses one of Colorado's largest, biologically diverse forests, including at least 17 separate ecosystems, ranging from rocky scrub oak and pinyon-juniper at lower elevations to aspen, spruce, and fir. Tracts of virgin timber exist at elevations as low as 7,000 feet, well below the typical elevation of most protected forested areas in Colorado. Hermosa contains some of the largest stands of old-growth ponderosa pine remaining in the San Juan Mountains.

One of Hermosa's most compelling attributes is the large majority of the watershed is roadless and generally un-impacted by past human activities. Hermosa Creek's tributaries harbor genetically pure strains of native Colorado River cutthroat trout in some of the most important populations in Colorado. The Hermosa watershed provides ideal habitat for rare Canada lynx, and sustains vast herds of deer and elk that draw thousands of hunters annually. Hermosa's pristine beauty and large trail system entices countless hikers, mountain bikers, hunters, horseback users, and numerous other recreational enthusiasts.