Miles between Great Falls, MT and San Marcos, TX

There are
1,707 mi
from Great Falls, MT to San Marcos, TX

That's the driving distance. It would take 1 day 6 hours to go from Great Falls, Montana to San Marcos, Texas.

The flight distance (direct flight from Great Falls, MT to San Marcos, TX) is 1,409.87 mi.

1,707 mi = 2,746.77 kms