mapquest/googlemaps
It is 346 miles according to Google Maps.
360 miles
about 340 miles
345 miles taking I-90 WEST.
It is 345 miles according to Google Maps.
The driving distance from Billings Montana to Missoula Montana is 343 miles via I-90 West per MapQuest. The driving time per MapQuest is 4 hours and 41 minutes.
Some major cities of Montana are Billings Bozeman Butte Great Falls Helena Kalispell Missoula
Yes, it is very safe to drive from Redmond, OR to Mt. Rushmore. Stopping in Missoula and Billings will be just fine.
313 miles
1185 miles
404 miles
I believe that would be Livingston or Bozeman