Miles between Great Falls, MT and San Marcos, CA

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

That's the driving distance. It would take 21 hours 45 mins to go from Great Falls, Montana to San Marcos, California.

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

1,288 mi = 2,073.01 kms