Adding water, Yellowstone N.P.

Adding early road to Yellowstone

Adding early road to Yellowstone

Adding early road to Yellowstone

Adding former US 89 route and other features

Adding former US 89 route

Adding US 89 north of Gardiner, MT

Adding US 89 north of Gardiner, MT

Adding US 89 north of Gardiner, MT

Adding Union Pacific Park Branch Line

Adding Union Pacific Park Branch Line

Adding Union Pacific Park Branch Line

Adding West Entrance Road

Adding highways W. Yellowstone area

Adding wikipedia references

Adding US 287-191 into Yellowstone

Adding Hebgen Lake

Adding Earthquake Lake

Adding waterways

Adding waterways