The TIC TAC DESERT MARATHON is a 110 km running race listed for Merzouga, Morocco. Source data also ties the event listing to Barcelona, Spain. It is a mountain-style desert event, not a standard city road marathon, and available listings place it in June.
The course information is limited, but the distance alone classifies it as an ultra. Runners are preparing for a long day or more on foot, not a classic 42.2 km marathon. The clearest location marker is Merzouga, the Moroccan desert village near the Erg Chebbi dunes. The Barcelona and Spain references appear to be listing metadata rather than the actual race terrain.