Colossal Cave Mountain Park is located at the base of the Rincon Mountains east of Tucson, Arizona. The park features an extraordinary cave at its heart, but also encompasses rugged and dramatic Sonoran Desert scenery. The Arizona Trail also passes right through the park, giving hikers and mountain bikers a sampling of what the park has to offer, including large desert mountains and classic Sonoran Desert vegetation. Hikers and visitors can also take advantage of the La Selvilla Campground tucked away deep in the mountains nearby the park's main visitor center.