It's difficult to work out the timing between Amarillo and Sunnyvale. The way the cities are spaced, you can do 3 long days or 4 short days. Since long days of driving are dangerous, especially when you are driving into the late afternoon sun, we opted for 4 short days.
The scenery between Flagstaff and Barstow is pretty. Nice healthy pine forest leaving Flagstaff. One mountain range after another.
We had lunch at Denny's in Needles; an acceptable chicken salad. Needles is a pretty small town without much going for it.
We stayed at a number of Comfort Suite hotels (toward the high end of the Choice hotel chain) on the trip, enough to get the last two nights of the trip free, based on points. Last night we had a truly crummy Quality Inn (toward the low end of the Choice hotel chain; reminded me of how we used to travel), but tonight's Quality Inn is pretty nice: more spacious, fresher and more functional, with a swinging bar and Mexican restaurant.
It was 29 degrees in Flagstaff when we awoke; it was 89 degrees in Barstow when we arrived.
You may notice that this was the 60th of 60 days and still we're not home. Actually it was 60 nights in motels, and 61 days on the road. Home tomorrow. We were not especially in a hurry to get home, until Amarillo. This last few days with all driving and few distractions makes us impatient.