The Smithsonian Butte Back Country Byway is a Type I* byway. Check weather forecasts; this byway may be impassable by two-wheel drive vehicles during heavy rain. Services are not available along the byway. Services are available on the south side of the byway in Apple Valley (Hwy 59) and on the north side of the byway in Rockville or Springdale (Hwy 9). 

*Roads are paved or have an all weather surface and have grades that are negotiable by two-wheel drive vehicles and passenger cars. Most of these roads are narrow, slow speed, secondary routes through public lands.