Bent's Old Fort in Colorado is worth anyone's time. Even the historical stops on the Sante Fe Trail in Kansas, CO, NM are wonderful if you have 1/2 a mind to imagine what was there not just what you actually see.
In Utah/AZ Monument Valley is worth the effort. Spend the night in the park if you can.The valley straddles the borders.
WY has some excellent old forts, Oregon Trail stops and Cody. Our next trip is in AZ and NM. National Parks and Spanish Missions is our goal. Whatever you end up doing, give us a report.
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