You probably have never heard of the Ras al Khaimah aka RAK Half Marathon. Which is a shame, because the RAK Half Marathon is one of the fastest Half Marathons in the world. It currently (2019) is the course of the European Record, set by Swiss runner Julien Wanders in February 2019..
The RAK Half Marathon is very fast and flat, but unfortunately also a bit boring, because it is located in a quite remote area. But you will definitely not miss your friends and family on the sidelines, and the weather will also very like be fantastic. One more cool thing: the official RAK Half Marathon race pictures are free for everyone afterwards.