Butte County Sunrise / SunsetUnited StatesSDButte CountySunset8:35 pmBelle FourcheSunset at 8:35 pmSunset8:35 pmCastle RockSunset at 8:35 pmArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale