Miles between Longmont, CO and Sierra Madre, CA

There are
1,028 mi
from Longmont, CO to Sierra Madre, CA

That's the driving distance. It would take 18 hours 5 mins to go from Longmont, Colorado to Sierra Madre, California.

The flight distance (direct flight from Longmont, CO to Sierra Madre, CA) is 823.78 mi.

1,028 mi = 1.61 kms