There are
2,683 mi
from Gaithersburg, MD to Rocklin, CA
That's the driving distance. It would take 1 day 22 hours to go from Gaithersburg, Maryland to Rocklin, California.
The flight distance (direct flight from Gaithersburg, MD to Rocklin, CA) is 2,341.88 mi.
2,683 mi = 4,318.54 kms