Butte County Sunrise / SunsetUnited StatesSDButte CountySunset8:31 pmBelle FourcheSunset at 8:31 pmSunset8:30 pmCastle RockSunset at 8:30 pmArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale