Impressive drone shot of an endurance swimming competition in which a large number of participants swim, many of them with colored buoys

flight drone reservoirwater large influx championship endurance participantsswimming buoyscolors landscape 10 bit color 2997fps burguillo reservoir avila province event sport swimming nature aquatic competition career athletes i swim physical resistance sporting event mountains scene aerial surfboard supervisor view swimmers sweet water proof competence aquatic event outdoor competition competition in the water picturesque background natural landscape swimmers with buoys reservoir competition floating buoys acuatic sport swimming race swimming in reservoir endurance swimmers natural environment water resistance natural background spring aquatic landscape