Miles between San Marcos, CA and Gillette, WY

There are
1,230 mi
from San Marcos, CA to Gillette, WY

That's the driving distance. It would take 21 hours 47 mins to go from San Marcos, California to Gillette, Wyoming.

The flight distance (direct flight from San Marcos, CA to Gillette, WY) is 992.19 mi.

1,230 mi = 1.61 kms