Petroleum County Sunrise / SunsetUnited StatesMTPetroleum CountySunset7:20 pmWinnettSunset at 7:20 pmSunset7:21 pmWild Horse LakeSunset at 7:21 pmFlatwillowLittle Bear LakePetrolia LakeTeigenWar Horse LakeWar Horse National Wildlife RefugeWild Horse LakeWinnettYellow Water Reservoir