There are 198.02 miles from Keystone to Longmont in southwest direction and 242 miles (389.46 kilometers) by car, following the I-76 W route.
Keystone and Longmont are 3 hours 36 mins far apart, if you drive non-stop .
This is the fastest route from Keystone, NE to Longmont, CO. The halfway point is Merino, CO.
Keystone, NE and Longmont, CO are in the same time zone (MDT). Current time in both locations is 6:11 pm.
Any questions or tips to share?
Share with fellow travellers any question or tips about the route from Keystone, NE to Longmont, CO: