Butte County Sunrise / SunsetUnited StatesSDButte CountySunset8:40 pmBelle FourcheSunset at 8:40 pmSunset8:39 pmCastle RockSunset at 8:39 pmArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale