I have been blessed to visit ~40 states so far.

From Houston to El Paso, that is I-10. I-10 actually is a straight shot from Houston to El Paso. I-10 runs through San Antonio. I don't know why your little map has a detour through Austin. That is not a recommended way. Stay on I-10. Speed limit between San Antonio and El Paso is now higher than the posted limit...like 80. Going through SA will be quicker and easier.

Don't know what you are doing in Houston (ain't much to see in my opinion) but I would rather visit San Antonio as it has a better 'texas flavor'. Love texas, but never thought houston was worth a shit, personally.

Another place I think you should take a detour is Salt Lake. Instead, go I-70 to Denver. MJ is decriminalized and tolerated so you can literally be A MILE HIGH!

Also, check out Mount Evans Scenic Byway -- Road Open/Closing Information

That is mount evans. It is *THE* highest paved road in north america. As you can see it opens memorial day usually. Have a good solid car as you will be at 14k feet. Top of the world. Smoke a bowl in the car and no telling how high you can be. Definately a must see. Better than Cheyenne. Mt. Evans is about 1 hour west of Denver. Great drive. I recommend it. Once you go through Denver, you can head NE and get back on your route.