I've been driving all the highways mentioned for over 40 years. The list here of things to see is great, but you won't get even half of them visited in one day. You will really do none of them justice unless you take an extra day. Drive time by Google is just that--drive time. Figure any time for meals, fuel, traffic delays (and there can be some on the day after Memorial Day), side trips, etc. and the time stretches out. Any one of the places suggested can add an hour or more to your time on the road.
And, don't even think of speeding to make up time. The Colorado State Patrol drastically increases patrolling around any holiday weekend and a Colorado speeding citation is a very expensive proposition. CSP also uses a large number of unmarked patrol cars, especially in the rural areas.
Edited 1 time(s). Last edit at 05/14/2015 02:46PM by Wade Hall.