Now in Cheyenne, Wyoming.
I feel like I'm not getting anywhere very fast. Colorado turned out to be a good deal south of the road I'm on, so I think I'll try to go back home through Colorado rather than diverting now. The distances are a bit daunting. I can see now that the way to really do this would be to pick a region of the country of interest, fly into the nearest big city and then explore from a base rather than trying to fill in the spaces by car. Still, it's been interesting so far. Likely to end up in North Platte, Nebraska tonight.