Good hours
Mountains at sunrise. Hatta lakes before 08:00. Desert drives after sunset in summer.

Things to do
Jebel Jais, Hatta, desert edges, and the roads that make the UAE feel larger than a long weekend.
Adventure here is mostly altitude and distance. Jebel Jais for cooling air, Hatta for still water at dawn, desert edges before the tour buses arrive. Leave early or do not bother — Thursday traffic writes the ending.
Mountains at sunrise. Hatta lakes before 08:00. Desert drives after sunset in summer.
Start here

The highest road in the UAE. The temperature drop is the souvenir.

Kayaks on still water, then a slow drive home that is not Thursday at 17:00.

Dunes when the sand stops burning. One hour is enough if you timed it right.