Lots of choices. Do you want to take interstates or the "Blue Highways"? You will most likely want to start by picking up I-70 from I-95. We prefer taking I-68 to I-79 to I-64 rather than staying on I-70. In the Saint Louis area, you have some choices. I-70 will take you West through Colorado to Utah. You could also pickup either
US-50 or
US-36 to travel through the heartland of the country. Another choice is to take I-44 to I-40. Amarillo would likely be the warmest spot along this route. I-40 follows Historic Route 66 through New Mexico and Arizona.
There is a lot to see along I-40. In Amarillo, there is
Palo Duro Canyon State Park and the
Big Texan on Old Route 66. In New Mexico,
Tucumcari still has dinners along Historic Route 66 and numerous murals painted on buildings plus other attractions. Santa Rosa is another Route 66 town and has the
The Blue Hole and
Santa Rosa Lake State Park which has a nice campground. In Albuquerque, the
Pueblo Cultural Center, the
Turquoise Trail, the
Sandia Crest Highway and
Petroglyph National Monument are worth visiting in my opinion. In Grants, there is the
Mining Museum. Just South of I-40 going West from Grants are
El Malpais National Monument,
El Moro National Monument and the
Ice Cave and Bandera Volcano.
Acoma Sky City is said to be the longest occuppied location in the U.S. They give tours of the pueblo and there is an RV park next to the casino.
Meteor Crater and
Petrified Forest National Park are not far from the Arizona/New Mexico border.
Homolovi Ruins State Park is near
Winslow where you can stand on the corner.
In the Flagstaff area are
Sunset Crater National Monument,
Wupatki National Monument, and
Walnut Canyon National Monument. Sedona/Camp Verde/Cottonwood are about an hour South of Flagstaff with
Montezuma Castle and Montezuma Well National Monuments,
Tuzigoot National Monument,
Palatki and Honaki Ruins,
V-Bar-V Heritage Site,
Verde Canyon Railroad,
Fort Verde State Park,
Cathedral Rock,
Gold King Mine,
Jerome State Historic Park in the area.
Grand Canyon National Park is not far North Of I-40. From there, it is not far to many of the Utah National Parks and other great places.
US-89 can take you all the way to Grand Teton National Park with many great places along the way.
Safe travels!
Trailertraveler