Much of Yellowstone’s infrastructure was severely damaged in the floods of June 2022. The largest effects were on the North Entrance Road, which was completely destroyed in several areas. An alternate route is in place until further notice. All directions are subject to change.

Yellowstone’s roads can seem endless at times. The interior park road (the Grand Loop Road) is essentially a huge figure eight, with five entrance roads providing access at various points. Each intersection is named for an area feature, and road sections are normally referred to in this way to avoid confusion. It is very important during a visit here to know the route you plan to take. It can take several hours to go from one end of the park to the other, and without careful planning you could spend all day in the car without seeing any of what you had planned to.

Use our detailed descriptions of the road sections listed below to help plan your visit. The sections of the Grand Loop Road are generally listed below in a clockwise fashion starting at the West Entrance Road. The mile by mile pages beyond always follow the clockwise pattern, except in the case of the entrance roads, which always go from park border to interior.

East Entrance Road

Start Point: Mile 0 – East Entrance
End Point: Mile 26.4 – Fishing Bridge Junction

North Entrance Road

Start Point: Mile 0 – North Entrance
End Point: Mile 5.3 – Mammoth Junction

Northeast Entrance Road

Start Point: Mile 0 – Northeast Entrance
End Point: Mile 29.1 – Tower Junction

South Entrance Road

Start Point: Mile 0 – South Entrance
End Point: Mile 21.8 – West Thumb Junction

West Entrance Road

Start Point: Mile 0 – West Entrance
End Point: Mile 14.1 – Madison Junction

Madison to Norris

Start Point: Mile 0 – Madison Junction
End Point: Mile 13.6 – Norris Junction

Norris to Mammoth

Start Point: Mile 0 – Norris Junction
End Point: Mile 21.4 – Mammoth Junction

Mammoth to Tower

Start Point: Mile 0 – Mammoth Junction
End Point: Mile 18.4 – Tower Junction

Tower to Canyon

Start Point: Mile 0 – Tower Junction
End Point: Mile 18.6 – Canyon Junction

Norris to Canyon

Start Point: Mile 0 – Norris Junction
End Point: Mile 11.8 – Canyon Junction

Canyon to Fishing Bridge

Start Point: Mile 0 – Canyon Junction
End Point: Mile 15.6 – Fishing Bridge Junction

Fishing Bridge to West Thumb

Start Point: Mile 0 – Fishing Bridge Junction
End Point: Mile 21.0 – West Thumb Junction

West Thumb to Old Faithful

Start Point: Mile 0 – West Thumb Junction
End Point: Mile 15.6 – Old Faithful Interchange

Old Faithful to Madison

Start Point: Mile 0 – Old Faithful Interchange
End Point: Mile 16.1 – Madison Junction