Welcome to the RoadTrip America Forum!

Three weeks is plenty of time to take this trip and to see a decent amount of the country, especially since this will be a one-way endeavor! Will you be driving with just your vehicle, or will you be towing along any of the times needed to make your move - i.e. will you have a trailer? It may seem a minor detail, but I think that if you were wishing to traverse some of the secondary roads, that additional burden could make it more difficult.

Aside from Denver, are there any places you've wanted to see over the years and haven't been able to. Likewise, are there any places you may get the opportunity to stop at on this trip that you may not to in the future? For example, on your trip you have the time to see both Yellowstone and the Grand Canyon, if you're so inclined. Those would be on the top of my list on such a trip, as it lends itself to a bit of a north-south zig-zag routing being viable.