The driving time from Portland to Mt. Rushmore via Boise, Yellowstone National Park is 21 hours 20 minutes by road. You can also find other options to travel from Portland to Mt. Rushmore via Boise, Yellowstone National Park like bus, subway, tram, train and rail. To know the travel distances while planning a journey, find the
Distance from Portland to Mt. Rushmore via Boise, Yellowstone National Park!