When we take 6 days for this trip that is only be about 166 miles a day average.

That is less than 3 hours in the saddle at 55 MPH. But most days we will do more than that anyway . We might stop at several colorful bars ans taverns on the way and enjoy ourselves and relax a bit more too. Grand Junction has a very good steak house. We do it so we can walk around and see the magnificent and weird ass  Western landscapes.