Wildland fires are natural hazard that occur every year in different parts of the world. European Mediterranean countries often are suffering from this disaster and in some cases human casualties and infrastructure damages are in place. Bulgaria as part of the north east Mediterranean basin is affected by wildland fires in the last three decades more often than before. Fire behaviour analyses is the main tool for the decision makers to understand and better prepare for the future fire events. In our article we will describe the data collection challenges and wildfire simulation preparatory work that every wildfire analyst in Bulgaria has to overcome fulfilling the task.