Miles between Longmont, CO and Grass Valley, CA

There are
1,100 mi
from Longmont, CO to Grass Valley, CA

That's the driving distance. It would take 18 hours 39 mins to go from Longmont, Colorado to Grass Valley, California.

The flight distance (direct flight from Longmont, CO to Grass Valley, CA) is 849.85 mi.

1,100 mi = 1.61 kms