Yellowstone N Park Explorer
This software is exactly the same as NG map 201 which I carry for all hiking at YNP. It has good detail but not quite as good as the 4 more detailed maps that NG does of YNP - map numbers 302 thru 305. These maps show back country campsites and better mileage and topo detail.    My complaint with NG maps is why they didn't use the more detail that they have available to make the software map. It is simply a picture of the map 201.