about 460 miles
100 miles taking I-25 SOUTH.
It is 343.88 miles according to MapQuest.
It is 146 miles according to Google Maps.
280 miles taking I-25 NORTH.
The shortest driving distance is 450 miles.
The driving distance is about 105 road miles.
513 miles
425 miles taking this route:Take I-90 EAST to I-25 SOUTH to CASPER at EXIT 56B.Take I-25 SOUTH to Denver.
151 miles. Couple of hours to do the drive.
80 miles
It is 325 miles.
It is 525 miles according to Google Maps.