The drive from Longmont to Casper is approximately 300 miles. You will head north through Colorado and into Wyoming. The drive takes about 5 hours. You will pass through beautiful mountain scenery and vast plains. This route is perfect for those who enjoy nature and outdoor activities.
Total Distance: 480 km driving distance, 400 km straight-line air distance.
The drive through the Rockies is beautiful but requires careful driving.
Summer or early fall to avoid winter snow in the mountains.