Miles between San Marcos, CA and Round Lake, IL

There are
2,048 mi
from San Marcos, CA to Round Lake, IL

That's the driving distance. It would take 1 day 12 hours to go from San Marcos, California to Round Lake, Illinois.

The flight distance (direct flight from San Marcos, CA to Round Lake, IL) is 1,700.55 mi.

2,048 mi = 3.22 kms