Miles between Thornton, CO and Forest Grove, OR

There are
1,261 mi
from Thornton, CO to Forest Grove, OR

That's the driving distance. It would take 21 hours 50 mins to go from Thornton, Colorado to Forest Grove, Oregon.

The flight distance (direct flight from Thornton, CO to Forest Grove, OR) is 997.64 mi.

1,261 mi = 1.61 kms