There are
2,884 mi
from San Marcos, CA to Pittsfield, MA
That's the driving distance. It would take 2 days 4 hours to go from San Marcos, California to Pittsfield, Massachusetts.
The flight distance (direct flight from San Marcos, CA to Pittsfield, MA) is 2,453.37 mi.
2,884 mi = 3.22 kms