Lakes in Petroleum County, Montana and Surrounding Areas   OTHER COUNTIES NEARBY Musselshell County Phillips County Treasure County Montana Lakes Unreviewed Lakes in Petroleum County, Montana Headman-Field Reservoir Little Bear Lake Petrolia Lake Prtrolla Lake War Horse Lake War Horse Lake War Horse Lake Wild Horse Lake Yellow Water Reservoir To submit a review of one of the lakes above please fill out the form below. The name of the lake, (and your own name if you want):