There are
1,899 mi
from Duluth, MN to Grass Valley, CA
That's the driving distance. It would take 1 day 9 hours to go from Duluth, Minnesota to Grass Valley, California.
The flight distance (direct flight from Duluth, MN to Grass Valley, CA) is 1,543.42 mi.
1,899 mi = 1.61 kms