The journey from Custer to Denver covers roughly 400 miles. Driving via US-85 and I-25 is the most direct route, taking about 6 hours. You will travel from the Black Hills into the heart of Colorado. This route is perfect for those looking to experience the transition from the plains to the Rocky Mountains.
Total Distance: 640 km driving, 580 km air.
The drive is straightforward and scenic.
May to September for the best weather.