Miles between San Marcos, CA and Diamond Bar, CA

There are
86 mi
from San Marcos, CA to Diamond Bar, CA

That's the driving distance. It would take 1 hour 41 mins to go from San Marcos, California to Diamond Bar, California.

The flight distance (direct flight from San Marcos, CA to Diamond Bar, CA) is 71.52 mi.

86 mi = 138.58 kms