Not to mention that it's 323 miles from Billings to Rapid City.
As I see it, 5 Superchargers are needed to finish the I-90 route and make it a comfortable, good-speed, almost-all-weather route. We are not quite there, yet...
- Coeur d'Alene, ID
- Superior, MT
- Butte, MT
- Sheridan, WY
- Gillette, WY