There are
2,886 mi
from San Mateo, CA to Hopatcong, NJ
That's the driving distance. It would take 2 days 2 hours to go from San Mateo, California to Hopatcong, New Jersey.
The flight distance (direct flight from San Mateo, CA to Hopatcong, NJ) is 2,529.53 mi.
2,886 mi = 3.22 kms