There are
2,676 mi
from Gaithersburg, MD to Placerville, CA
That's the driving distance. It would take 1 day 23 hours to go from Gaithersburg, Maryland to Placerville, California.
The flight distance (direct flight from Gaithersburg, MD to Placerville, CA) is 2,320.20 mi.
2,676 mi = 4,306.66 kms