There are
1,716 mi
from Lewisville, TX to Grass Valley, CA
That's the driving distance. It would take 1 day 7 hours to go from Lewisville, Texas to Grass Valley, California.
The flight distance (direct flight from Lewisville, TX to Grass Valley, CA) is 1,404.18 mi.
1,716 mi = 1.61 kms