There are
2,687 mi
from Gaithersburg, MD to Roseville, CA
That's the driving distance. It would take 1 day 22 hours to go from Gaithersburg, Maryland to Roseville, California.
The flight distance (direct flight from Gaithersburg, MD to Roseville, CA) is 2,345.28 mi.
2,687 mi = 4,324.88 kms