The first day of the trip, estimated by Google to be 4 hours and 20 minutes turned out to be more like 10 and a half hours. We knew it would be longer than the estimate, but did not think that it would be that much longer!
We spent the first night in Matehuala, in the state of San Luis Potosi. It is in the high Mexican desert, traveling all day in the 6500 feet above sea level range, but just gentle rolling hills. There were lots of mountains getting up to that level, but once there it was just “high plains”.
Las Palmas was like an oasis. Beautiful, nice restaurant, good food, and RV parking out behind the motel for about $20/night. We had both dinner and breakfast in the restaurant, before heading out the next morning for Laredo, TX.