Crystal Park is a unique recreation area at an elevation of 7,800 feet in the Pioneer Mountains in southwest Montana. Crystal Park is open for day use only and has a fee per car. Facilities include 3 picnic sites with tables and grills, information signs, toilets, and a paved trail with benches and an overlook. The facilities are designed to be universally accessible.
Quartz crystals are scattered liberally through the decomposed granite of the unique 220-acre site that's been reserved by the Forest Service for the popular hobby of rockhounding. Quartz crystals are hexagonal (six-sided) prisms, with a pointed "face" at each end. The crystals found at Crystal Park can be clear, cloudy, white, gray or purple. They can be smaller than your little finger or up to several inches in diameter. Gray, purple and other colors are caused by minerals within the quartz. Gray crystals are known as "smoky" and the highly prized purple ones are called amethyst. Single crystals are most common at Crystal Park. Most of the crystals have little value other than as collector's items.
Though the national forest has only one designated mineral collection area, it is still a great place for prospecting, rock hounding, and invertebrate fossil hunting. These activities usually do not require a permit when there is little or no disturbance to the environment. Special regulations apply to the collection of petrified wood. It is illegal to collect artifacts, such as arrowheads, old bottles and other historic items on the National Forest.