The town of Keystone is located in the county of Pennington. It covers a total area of 7.41 sq. km. The pro business climate of the city has enhanced the development of businesses related to consultancy in business, banquet facilities, contracting in excavation, management consultancy, contracting in remodeling and repairing, rental agencies in property and telecommunication services, contribute to the economy in a positive way. Commercial spaces are utilized by riding academics, restaurants, libraries and campgrounds.