National Recreation Trail (NRT) is a designation given to existing trails that contribute to health, conservation, and recreation goals in the United States. Over 1,148 trails in all 50 U.S. states, available for public use and ranging from less than a mile to 485 miles (781 km) in length, have been designated as NRTs on federal, state, municipal, and privately owned lands. Trails may be nominated for designation as NRTs each year. The NRT online database includes information on most designated trails. National Recreational Trails are part of the National Trails System