Miles between Thornton, CO and Grass Valley, CA

There are
1,114 mi
from Thornton, CO to Grass Valley, CA

That's the driving distance. It would take 18 hours 53 mins to go from Thornton, Colorado to Grass Valley, California.

The flight distance (direct flight from Thornton, CO to Grass Valley, CA) is 857.25 mi.

1,114 mi = 1.61 kms