Miles between San Marcos, CA and Helena, MT

There are
1,201 mi
from San Marcos, CA to Helena, MT

That's the driving distance. It would take 20 hours 21 mins to go from San Marcos, California to Helena, Montana.

The flight distance (direct flight from San Marcos, CA to Helena, MT) is 968.04 mi.

1,201 mi = 1.61 kms