Petroleum County Sunrise / SunsetUnited StatesMTPetroleum CountySunset9:05 pmWinnettSunset at 9:05 pmSunset9:06 pmWild Horse LakeSunset at 9:06 pmFlatwillowLittle Bear LakePetrolia LakeTeigenWar Horse LakeWar Horse National Wildlife RefugeWild Horse LakeWinnettYellow Water Reservoir