Miles between San Marcos, CA and Great Falls, MT

There are
1,288 mi
from San Marcos, CA to Great Falls, MT

That's the driving distance. It would take 21 hours 43 mins to go from San Marcos, California to Great Falls, Montana.

The flight distance (direct flight from San Marcos, CA to Great Falls, MT) is 1,038.18 mi.

1,288 mi = 1.61 kms