In 1989, 160-acres surrounding Formation Springs was turned into a preserve established by the Nature Conservancy to protect the crystal clear pools and unique wetland complex. The water feeding these terraced pools is very high in travertine (calcium carbonate), which has created a unique geology for the area, the most impressive work is Formation Cave which is 10 feet tall at its entrance and several hundred feet long. It features crystal pools and a wetland complex at the base of Aspen Mountain. The terraced pools are formed by cold springs that feed into them and deposit high concentrations of calcium carbonate.
Turn east at SR 34 Milepost 60.8 onto Trail Canyon Road. Proceed one mile to the preserve parking lot.