Thunder Basin National Grassland - South MVUM

Motor Vehicle Use Map (MVUM): the official map of which roads and trails are open to which vehicles, and when. Riding on a route not shown on the current MVUM is a federal violation, so always carry the latest edition. Medicine Bow-Routt National Forests & Thunder Basin National Grassland. Public domain map from the USDA Forest Service, republished from https://www.fs.usda.gov/r02/mbrtb/maps-guides/motor-vehicle-use-maps. When the forest posts a new edition it shows up here as a free update.